116915831 has 4 divisors (see below), whose sum is σ = 121999152. Its totient is φ = 111832512.

The previous prime is 116915809. The next prime is 116915863. The reversal of 116915831 is 138519611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138519611 = 811 ⋅170801.

It is a cyclic number.

It is not a de Polignac number, because 116915831 - 2⁶ = 116915767 is a prime.

It is a super-2 number, since 2×116915831² = 27338623076841122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 116915791 and 116915800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116915881) 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, 2541626 + ... + 2541671.

It is an arithmetic number, because the mean of its divisors is an integer number (30499788).

Almost surely, 2^116915831 is an apocalyptic number.

116915831 is a deficient number, since it is larger than the sum of its proper divisors (5083321).

116915831 is an equidigital number, since it uses as much as digits as its factorization.

116915831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083320.

The product of its digits is 6480, while the sum is 35.

The square root of 116915831 is about 10812.7624130007. The cubic root of 116915831 is about 488.9800120914.

The spelling of 116915831 in words is "one hundred sixteen million, nine hundred fifteen thousand, eight hundred thirty-one".