113562891 has 56 divisors (see below), whose sum is σ = 191703456. Its totient is φ = 66718080.

The previous prime is 113562887. The next prime is 113562929. The reversal of 113562891 is 198265311.

113562891 is a `hidden beast` number, since 1 + 1 + 3 + 562 + 8 + 91 = 666.

It is not a de Polignac number, because 113562891 - 2² = 113562887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113562851) 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 55 ways as a sum of consecutive naturals, for example, 217711 + ... + 218231.

It is an arithmetic number, because the mean of its divisors is an integer number (3423276).

Almost surely, 2^113562891 is an apocalyptic number.

113562891 is a deficient number, since it is larger than the sum of its proper divisors (78140565).

113562891 is an equidigital number, since it uses as much as digits as its factorization.

113562891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 560 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 113562891 is about 10656.5890884466. The cubic root of 113562891 is about 484.2602404286.

The spelling of 113562891 in words is "one hundred thirteen million, five hundred sixty-two thousand, eight hundred ninety-one".