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105438973 = 409257797
BaseRepresentation
bin1100100100011…
…01111011111101
321100101212002011
412102031323331
5203443021343
614243531221
72420134153
oct622157375
9240355064
10105438973
1154576952
122b389b11
1318ac9333
14100093d3
1593cb29d
hex648defd

105438973 has 4 divisors (see below), whose sum is σ = 105697180. Its totient is φ = 105180768.

The previous prime is 105438953. The next prime is 105438979. The reversal of 105438973 is 379834501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 379834501 = 937405373.

It can be written as a sum of positive squares in 2 ways, for example, as 49533444 + 55905529 = 7038^2 + 7477^2 .

It is a cyclic number.

It is not a de Polignac number, because 105438973 - 217 = 105307901 is a prime.

It is a super-2 number, since 2×1054389732 = 22234754054589458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105438979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128490 + ... + 129307.

It is an arithmetic number, because the mean of its divisors is an integer number (26424295).

Almost surely, 2105438973 is an apocalyptic number.

It is an amenable number.

105438973 is a deficient number, since it is larger than the sum of its proper divisors (258207).

105438973 is an equidigital number, since it uses as much as digits as its factorization.

105438973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258206.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 105438973 is about 10268.3481144729. The cubic root of 105438973 is about 472.4259253250.

The spelling of 105438973 in words is "one hundred five million, four hundred thirty-eight thousand, nine hundred seventy-three".

Divisors: 1 409 257797 105438973