118318731 has 8 divisors (see below), whose sum is σ = 159980544. Its totient is φ = 77768040.

The previous prime is 118318727. The next prime is 118318747. The reversal of 118318731 is 137813811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118318731 - 2² = 118318727 is a prime.

It is a super-2 number, since 2×118318731² = 27998644210900722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 118318692 and 118318701.

It is not an unprimeable number, because it can be changed into a prime (118318771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277531 + ... + 277956.

It is an arithmetic number, because the mean of its divisors is an integer number (19997568).

Almost surely, 2^118318731 is an apocalyptic number.

118318731 is a deficient number, since it is larger than the sum of its proper divisors (41661813).

118318731 is an equidigital number, since it uses as much as digits as its factorization.

118318731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555561.

The product of its digits is 4032, while the sum is 33.

The square root of 118318731 is about 10877.4413811337. The cubic root of 118318731 is about 490.9280357666.

The spelling of 118318731 in words is "one hundred eighteen million, three hundred eighteen thousand, seven hundred thirty-one".