118639161 has 12 divisors (see below), whose sum is σ = 177714992. Its totient is φ = 79092612.

The previous prime is 118639153. The next prime is 118639189. The reversal of 118639161 is 161936811.

It is a happy number.

118639161 is a `hidden beast` number, since 1 + 1 + 8 + 639 + 16 + 1 = 666.

It is not a de Polignac number, because 118639161 - 2³ = 118639153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118639151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243871 + ... + 244356.

Almost surely, 2^118639161 is an apocalyptic number.

It is an amenable number.

118639161 is a deficient number, since it is larger than the sum of its proper divisors (59075831).

118639161 is an frugal number, since it uses more digits than its factorization.

118639161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488242 (or 488230 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 118639161 is about 10892.1605294817. The cubic root of 118639161 is about 491.3708123119.

The spelling of 118639161 in words is "one hundred eighteen million, six hundred thirty-nine thousand, one hundred sixty-one".