118727631 has 24 divisors (see below), whose sum is σ = 188759376. Its totient is φ = 71312640.

The previous prime is 118727629. The next prime is 118727659. The reversal of 118727631 is 136727811.

118727631 is a `hidden beast` number, since 1 + 18 + 7 + 2 + 7 + 631 = 666.

It is not a de Polignac number, because 118727631 - 2¹ = 118727629 is a prime.

It is a super-2 number, since 2×118727631² = 28192500725744322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118727681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5881 + ... + 16493.

It is an arithmetic number, because the mean of its divisors is an integer number (7864974).

Almost surely, 2^118727631 is an apocalyptic number.

118727631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

118727631 is a deficient number, since it is larger than the sum of its proper divisors (70031745).

118727631 is a wasteful number, since it uses less digits than its factorization.

118727631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10743 (or 10740 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 118727631 is about 10896.2209504029. The cubic root of 118727631 is about 491.4929214429.

It can be divided in two parts, 11872 and 7631, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 118727631 in words is "one hundred eighteen million, seven hundred twenty-seven thousand, six hundred thirty-one".