115921863 has 24 divisors (see below), whose sum is σ = 175563648. Its totient is φ = 73565712.

The previous prime is 115921853. The next prime is 115921873. The reversal of 115921863 is 368129511.

115921863 is a `hidden beast` number, since 1 + 1 + 592 + 1 + 8 + 63 = 666.

It is an interprime number because it is at equal distance from previous prime (115921853) and next prime (115921873).

It is not a de Polignac number, because 115921863 - 2¹⁰ = 115920839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115921823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45756 + ... + 48222.

It is an arithmetic number, because the mean of its divisors is an integer number (7315152).

Almost surely, 2^115921863 is an apocalyptic number.

115921863 is a deficient number, since it is larger than the sum of its proper divisors (59641785).

115921863 is a wasteful number, since it uses less digits than its factorization.

115921863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723 (or 2720 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 115921863 is about 10766.7015840507. The cubic root of 115921863 is about 487.5903674685.

The spelling of 115921863 in words is "one hundred fifteen million, nine hundred twenty-one thousand, eight hundred sixty-three".