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68803349 = 181380129
BaseRepresentation
bin1000001100111…
…01101100010101
311210110120110012
410012131230111
5120103201344
610454410005
71463550566
oct406355425
9153416405
1068803349
1135923a7a
121b060905
131133cc54
1491d016d
15609129e
hex419db15

68803349 has 4 divisors (see below), whose sum is σ = 69183660. Its totient is φ = 68423040.

The previous prime is 68803337. The next prime is 68803363. The reversal of 68803349 is 94330886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5712100 + 63091249 = 2390^2 + 7943^2 .

It is a cyclic number.

It is not a de Polignac number, because 68803349 - 28 = 68803093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68803309) 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, 189884 + ... + 190245.

It is an arithmetic number, because the mean of its divisors is an integer number (17295915).

Almost surely, 268803349 is an apocalyptic number.

It is an amenable number.

68803349 is a deficient number, since it is larger than the sum of its proper divisors (380311).

68803349 is a wasteful number, since it uses less digits than its factorization.

68803349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380310.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 68803349 is about 8294.7784177758. The cubic root of 68803349 is about 409.7665714682.

The spelling of 68803349 in words is "sixty-eight million, eight hundred three thousand, three hundred forty-nine".

Divisors: 1 181 380129 68803349