113031491 has 4 divisors (see below), whose sum is σ = 113073912. Its totient is φ = 112989072.

The previous prime is 113031467. The next prime is 113031493. The reversal of 113031491 is 194130311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194130311 = 1493 ⋅130027.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113031491 is a prime.

It is a super-2 number, since 2×113031491² = 25552235915366162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113031493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16925 + ... + 22638.

It is an arithmetic number, because the mean of its divisors is an integer number (28268478).

Almost surely, 2^113031491 is an apocalyptic number.

113031491 is a deficient number, since it is larger than the sum of its proper divisors (42421).

113031491 is an equidigital number, since it uses as much as digits as its factorization.

113031491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42420.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 113031491 is about 10631.6269215958. The cubic root of 113031491 is about 483.5037188687.

The spelling of 113031491 in words is "one hundred thirteen million, thirty-one thousand, four hundred ninety-one".