118891315 has 4 divisors (see below), whose sum is σ = 142669584. Its totient is φ = 95113048.

The previous prime is 118891307. The next prime is 118891327. The reversal of 118891315 is 513198811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 513198811 = 15889 ⋅32299.

It is a cyclic number.

It is not a de Polignac number, because 118891315 - 2³ = 118891307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11889127 + ... + 11889136.

It is an arithmetic number, because the mean of its divisors is an integer number (35667396).

Almost surely, 2^118891315 is an apocalyptic number.

118891315 is a deficient number, since it is larger than the sum of its proper divisors (23778269).

118891315 is an equidigital number, since it uses as much as digits as its factorization.

118891315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23778268.

The product of its digits is 8640, while the sum is 37.

The square root of 118891315 is about 10903.7294078678. The cubic root of 118891315 is about 491.7186835068.

The spelling of 118891315 in words is "one hundred eighteen million, eight hundred ninety-one thousand, three hundred fifteen".