113772861 has 6 divisors (see below), whose sum is σ = 164338590. Its totient is φ = 75848568.

The previous prime is 113772839. The next prime is 113772889. The reversal of 113772861 is 168277311.

113772861 is a `hidden beast` number, since 1 + 1 + 377 + 286 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 84548025 + 29224836 = 9195^2 + 5406^2 .

It is not a de Polignac number, because 113772861 - 2⁷ = 113772733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113772811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6320706 + ... + 6320723.

It is an arithmetic number, because the mean of its divisors is an integer number (27389765).

Almost surely, 2^113772861 is an apocalyptic number.

It is an amenable number.

113772861 is a deficient number, since it is larger than the sum of its proper divisors (50565729).

113772861 is a wasteful number, since it uses less digits than its factorization.

113772861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12641435 (or 12641432 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 113772861 is about 10666.4361902184. The cubic root of 113772861 is about 484.5585113384.

The spelling of 113772861 in words is "one hundred thirteen million, seven hundred seventy-two thousand, eight hundred sixty-one".