118978955 has 4 divisors (see below), whose sum is σ = 142774752. Its totient is φ = 95183160.

The previous prime is 118978933. The next prime is 118978957. The reversal of 118978955 is 559879811.

It is a happy number.

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

It is not a de Polignac number, because 118978955 - 2¹⁸ = 118716811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118978897 and 118978906.

It is not an unprimeable number, because it can be changed into a prime (118978957) 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, 11897891 + ... + 11897900.

It is an arithmetic number, because the mean of its divisors is an integer number (35693688).

Almost surely, 2^118978955 is an apocalyptic number.

118978955 is a deficient number, since it is larger than the sum of its proper divisors (23795797).

118978955 is an equidigital number, since it uses as much as digits as its factorization.

118978955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23795796.

The product of its digits is 907200, while the sum is 53.

The square root of 118978955 is about 10907.7474759915. The cubic root of 118978955 is about 491.8394762966.

The spelling of 118978955 in words is "one hundred eighteen million, nine hundred seventy-eight thousand, nine hundred fifty-five".