113772961 has 4 divisors (see below), whose sum is σ = 113803924. Its totient is φ = 113742000.

The previous prime is 113772943. The next prime is 113772977. The reversal of 113772961 is 169277311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61716736 + 52056225 = 7856^2 + 7215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113772961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113772961.

It is not an unprimeable number, because it can be changed into a prime (113772941) 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, 9090 + ... + 17611.

It is an arithmetic number, because the mean of its divisors is an integer number (28450981).

Almost surely, 2^113772961 is an apocalyptic number.

It is an amenable number.

113772961 is a deficient number, since it is larger than the sum of its proper divisors (30963).

113772961 is an equidigital number, since it uses as much as digits as its factorization.

113772961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30962.

The product of its digits is 15876, while the sum is 37.

The square root of 113772961 is about 10666.4408778186. The cubic root of 113772961 is about 484.5586533050.

The spelling of 113772961 in words is "one hundred thirteen million, seven hundred seventy-two thousand, nine hundred sixty-one".