118646391 has 16 divisors (see below), whose sum is σ = 160617600. Its totient is φ = 77895648.

The previous prime is 118646371. The next prime is 118646399. The reversal of 118646391 is 193646811.

It is not a de Polignac number, because 118646391 - 2⁶ = 118646327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118646399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57520 + ... + 59546.

It is an arithmetic number, because the mean of its divisors is an integer number (10038600).

Almost surely, 2^118646391 is an apocalyptic number.

118646391 is a deficient number, since it is larger than the sum of its proper divisors (41971209).

118646391 is a wasteful number, since it uses less digits than its factorization.

118646391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318.

The product of its digits is 31104, while the sum is 39.

The square root of 118646391 is about 10892.4924145028. The cubic root of 118646391 is about 491.3807936671.

The spelling of 118646391 in words is "one hundred eighteen million, six hundred forty-six thousand, three hundred ninety-one".