118397977 has 2 divisors, whose sum is σ = 118397978. Its totient is φ = 118397976.

The previous prime is 118397969. The next prime is 118397989. The reversal of 118397977 is 779793811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87216921 + 31181056 = 9339^2 + 5584^2 .

It is a cyclic number.

It is not a de Polignac number, because 118397977 - 2³ = 118397969 is a prime.

It is not a weakly prime, because it can be changed into another prime (118397677) 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 as a sum of consecutive naturals, namely, 59198988 + 59198989.

It is an arithmetic number, because the mean of its divisors is an integer number (59198989).

Almost surely, 2^118397977 is an apocalyptic number.

It is an amenable number.

118397977 is a deficient number, since it is larger than the sum of its proper divisors (1).

118397977 is an equidigital number, since it uses as much as digits as its factorization.

118397977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 52.

The square root of 118397977 is about 10881.0834478925. The cubic root of 118397977 is about 491.0376137978.

The spelling of 118397977 in words is "one hundred eighteen million, three hundred ninety-seven thousand, nine hundred seventy-seven".