113772865 has 4 divisors (see below), whose sum is σ = 136527444. Its totient is φ = 91018288.

The previous prime is 113772839. The next prime is 113772889. The reversal of 113772865 is 568277311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568277311 = 7 ⋅81182473.

It can be written as a sum of positive squares in 2 ways, for example, as 58553104 + 55219761 = 7652^2 + 7431^2 .

It is a cyclic number.

It is not a de Polignac number, because 113772865 - 2⁹ = 113772353 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11377282 + ... + 11377291.

It is an arithmetic number, because the mean of its divisors is an integer number (34131861).

Almost surely, 2^113772865 is an apocalyptic number.

It is an amenable number.

113772865 is a deficient number, since it is larger than the sum of its proper divisors (22754579).

113772865 is an equidigital number, since it uses as much as digits as its factorization.

113772865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22754578.

The product of its digits is 70560, while the sum is 40.

The square root of 113772865 is about 10666.4363777224. The cubic root of 113772865 is about 484.5585170171.

The spelling of 113772865 in words is "one hundred thirteen million, seven hundred seventy-two thousand, eight hundred sixty-five".