118991315 has 4 divisors (see below), whose sum is σ = 142789584. Its totient is φ = 95193048.

The previous prime is 118991311. The next prime is 118991329. The reversal of 118991315 is 513199811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 118991315 - 2² = 118991311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118991311) 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, 11899127 + ... + 11899136.

It is an arithmetic number, because the mean of its divisors is an integer number (35697396).

Almost surely, 2^118991315 is an apocalyptic number.

118991315 is a deficient number, since it is larger than the sum of its proper divisors (23798269).

118991315 is an equidigital number, since it uses as much as digits as its factorization.

118991315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23798268.

The product of its digits is 9720, while the sum is 38.

The square root of 118991315 is about 10908.3140310499. The cubic root of 118991315 is about 491.8565071108.

The spelling of 118991315 in words is "one hundred eighteen million, nine hundred ninety-one thousand, three hundred fifteen".