118356857 has 4 divisors (see below), whose sum is σ = 120875136. Its totient is φ = 115838580.

The previous prime is 118356851. The next prime is 118356883. The reversal of 118356857 is 758653811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 758653811 = 509 ⋅1490479.

It is a cyclic number.

It is not a de Polignac number, because 118356857 - 2⁴ = 118356841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118356851) 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, 1259069 + ... + 1259162.

It is an arithmetic number, because the mean of its divisors is an integer number (30218784).

Almost surely, 2^118356857 is an apocalyptic number.

It is an amenable number.

118356857 is a deficient number, since it is larger than the sum of its proper divisors (2518279).

118356857 is an equidigital number, since it uses as much as digits as its factorization.

118356857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518278.

The product of its digits is 201600, while the sum is 44.

The square root of 118356857 is about 10879.1937660840. The cubic root of 118356857 is about 490.9807608989.

The spelling of 118356857 in words is "one hundred eighteen million, three hundred fifty-six thousand, eight hundred fifty-seven".