113509931 has 2 divisors, whose sum is σ = 113509932. Its totient is φ = 113509930.

The previous prime is 113509919. The next prime is 113509937. The reversal of 113509931 is 139905311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113509931 is a prime.

It is a super-2 number, since 2×113509931² = 25769008871249522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113509937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56754965 + 56754966.

It is an arithmetic number, because the mean of its divisors is an integer number (56754966).

Almost surely, 2^113509931 is an apocalyptic number.

113509931 is a deficient number, since it is larger than the sum of its proper divisors (1).

113509931 is an equidigital number, since it uses as much as digits as its factorization.

113509931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 113509931 is about 10654.1039510604. The cubic root of 113509931 is about 484.1849505463.

The spelling of 113509931 in words is "one hundred thirteen million, five hundred nine thousand, nine hundred thirty-one".