118431977 has 4 divisors (see below), whose sum is σ = 118457220. Its totient is φ = 118406736.

The previous prime is 118431919. The next prime is 118431983. The reversal of 118431977 is 779134811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18011536 + 100420441 = 4244^2 + 10021^2 .

It is a cyclic number.

It is not a de Polignac number, because 118431977 - 2⁶ = 118431913 is a prime.

It is a super-2 number, since 2×118431977² = 28052266352257058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118421977) 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, 3278 + ... + 15735.

It is an arithmetic number, because the mean of its divisors is an integer number (29614305).

Almost surely, 2^118431977 is an apocalyptic number.

It is an amenable number.

118431977 is a deficient number, since it is larger than the sum of its proper divisors (25243).

118431977 is an equidigital number, since it uses as much as digits as its factorization.

118431977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25242.

The product of its digits is 42336, while the sum is 41.

The square root of 118431977 is about 10882.6456801644. The cubic root of 118431977 is about 491.0846125766.

The spelling of 118431977 in words is "one hundred eighteen million, four hundred thirty-one thousand, nine hundred seventy-seven".