118399857 has 4 divisors (see below), whose sum is σ = 157866480. Its totient is φ = 78933236.

The previous prime is 118399847. The next prime is 118399859. The reversal of 118399857 is 758993811.

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.

It is a cyclic number.

It is not a de Polignac number, because 118399857 - 2⁶ = 118399793 is a prime.

It is a super-2 number, since 2×118399857² = 28037052275240898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118399859) 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, 19733307 + ... + 19733312.

It is an arithmetic number, because the mean of its divisors is an integer number (39466620).

Almost surely, 2^118399857 is an apocalyptic number.

It is an amenable number.

118399857 is a deficient number, since it is larger than the sum of its proper divisors (39466623).

118399857 is an equidigital number, since it uses as much as digits as its factorization.

118399857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39466622.

The product of its digits is 544320, while the sum is 51.

The square root of 118399857 is about 10881.1698360057. The cubic root of 118399857 is about 491.0402127888.

The spelling of 118399857 in words is "one hundred eighteen million, three hundred ninety-nine thousand, eight hundred fifty-seven".