113185931 has 2 divisors, whose sum is σ = 113185932. Its totient is φ = 113185930.

The previous prime is 113185889. The next prime is 113185939. The reversal of 113185931 is 139581311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 113185931 - 2¹⁸ = 112923787 is a prime.

It is a super-2 number, since 2×113185931² = 25622109952673522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113185939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56592965 + 56592966.

It is an arithmetic number, because the mean of its divisors is an integer number (56592966).

Almost surely, 2^113185931 is an apocalyptic number.

113185931 is a deficient number, since it is larger than the sum of its proper divisors (1).

113185931 is an equidigital number, since it uses as much as digits as its factorization.

113185931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 32.

The square root of 113185931 is about 10638.8876768204. The cubic root of 113185931 is about 483.7238295951.

The spelling of 113185931 in words is "one hundred thirteen million, one hundred eighty-five thousand, nine hundred thirty-one".