113264931991 has 4 divisors (see below), whose sum is σ = 114955453432. Its totient is φ = 111574410552.

The previous prime is 113264931979. The next prime is 113264932013. The reversal of 113264931991 is 199139462311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199139462311 = 2437 ⋅81715003.

It is a cyclic number.

It is not a de Polignac number, because 113264931991 - 2⁷ = 113264931863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113264935991) 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, 845260620 + ... + 845260753.

It is an arithmetic number, because the mean of its divisors is an integer number (28738863358).

Almost surely, 2^113264931991 is an apocalyptic number.

113264931991 is a deficient number, since it is larger than the sum of its proper divisors (1690521441).

113264931991 is an equidigital number, since it uses as much as digits as its factorization.

113264931991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690521440.

The product of its digits is 314928, while the sum is 49.

The spelling of 113264931991 in words is "one hundred thirteen billion, two hundred sixty-four million, nine hundred thirty-one thousand, nine hundred ninety-one".