118888631 has 4 divisors (see below), whose sum is σ = 119263992. Its totient is φ = 118513272.

The previous prime is 118888621. The next prime is 118888639. The reversal of 118888631 is 136888811.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118888631 is a prime.

It is a super-2 number, since 2×118888631² = 28269013162108322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118888639) 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, 187205 + ... + 187838.

It is an arithmetic number, because the mean of its divisors is an integer number (29815998).

Almost surely, 2^118888631 is an apocalyptic number.

118888631 is a deficient number, since it is larger than the sum of its proper divisors (375361).

118888631 is an equidigital number, since it uses as much as digits as its factorization.

118888631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375360.

The product of its digits is 73728, while the sum is 44.

The square root of 118888631 is about 10903.6063300176. The cubic root of 118888631 is about 491.7149832564.

The spelling of 118888631 in words is "one hundred eighteen million, eight hundred eighty-eight thousand, six hundred thirty-one".