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109680481 = 176451793
BaseRepresentation
bin1101000100110…
…01011101100001
321122101100100001
412202121131201
5211034233411
614514500001
72501161111
oct642313541
9248340301
10109680481
1156a03629
1230894601
1319952ac1
14107d1041
159967dc1
hex6899761

109680481 has 4 divisors (see below), whose sum is σ = 116132292. Its totient is φ = 103228672.

The previous prime is 109680463. The next prime is 109680497. The reversal of 109680481 is 184086901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184086901 = 601306301.

It can be written as a sum of positive squares in 2 ways, for example, as 97318225 + 12362256 = 9865^2 + 3516^2 .

It is a cyclic number.

It is not a de Polignac number, because 109680481 - 219 = 109156193 is a prime.

It is a super-2 number, since 2×1096804812 = 24059615824782722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109680481.

It is not an unprimeable number, because it can be changed into a prime (109680421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3225880 + ... + 3225913.

It is an arithmetic number, because the mean of its divisors is an integer number (29033073).

Almost surely, 2109680481 is an apocalyptic number.

It is an amenable number.

109680481 is a deficient number, since it is larger than the sum of its proper divisors (6451811).

109680481 is an equidigital number, since it uses as much as digits as its factorization.

109680481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6451810.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 109680481 is about 10472.8449334457. The cubic root of 109680481 is about 478.6776116445.

The spelling of 109680481 in words is "one hundred nine million, six hundred eighty thousand, four hundred eighty-one".

Divisors: 1 17 6451793 109680481