115863687 has 48 divisors (see below), whose sum is σ = 184740192. Its totient is φ = 69672960.

The previous prime is 115863679. The next prime is 115863689. The reversal of 115863687 is 786368511.

115863687 is a `hidden beast` number, since 1 + 1 + 5 + 8 + 636 + 8 + 7 = 666.

It is not a de Polignac number, because 115863687 - 2³ = 115863679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115863689) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 549012 + ... + 549222.

It is an arithmetic number, because the mean of its divisors is an integer number (3848754).

Almost surely, 2^115863687 is an apocalyptic number.

115863687 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

115863687 is a deficient number, since it is larger than the sum of its proper divisors (68876505).

115863687 is a wasteful number, since it uses less digits than its factorization.

115863687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 365 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 115863687 is about 10763.9995819398. Note that the first 3 decimals coincide. The cubic root of 115863687 is about 487.5087872183.

The spelling of 115863687 in words is "one hundred fifteen million, eight hundred sixty-three thousand, six hundred eighty-seven".