118957139 has 4 divisors (see below), whose sum is σ = 135951024. Its totient is φ = 101963256.

The previous prime is 118957099. The next prime is 118957171. The reversal of 118957139 is 931759811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931759811 = 61 ⋅15274751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118957139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118957139.

It is not an unprimeable number, because it can be changed into a prime (118957639) by changing a digit.

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, 8496932 + ... + 8496945.

It is an arithmetic number, because the mean of its divisors is an integer number (33987756).

Almost surely, 2^118957139 is an apocalyptic number.

118957139 is a deficient number, since it is larger than the sum of its proper divisors (16993885).

118957139 is an equidigital number, since it uses as much as digits as its factorization.

118957139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16993884.

The product of its digits is 68040, while the sum is 44.

The square root of 118957139 is about 10906.7474069954. The cubic root of 118957139 is about 491.8094132043.

The spelling of 118957139 in words is "one hundred eighteen million, nine hundred fifty-seven thousand, one hundred thirty-nine".