117686637 has 12 divisors (see below), whose sum is σ = 173609280. Its totient is φ = 76788168.

The previous prime is 117686617. The next prime is 117686641. The reversal of 117686637 is 736686711.

117686637 is a `hidden beast` number, since 1 + 1 + 7 + 6 + 8 + 6 + 637 = 666.

It is not a de Polignac number, because 117686637 - 2⁶ = 117686573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117686592 and 117686601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117686617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138687 + ... + 139532.

It is an arithmetic number, because the mean of its divisors is an integer number (14467440).

Almost surely, 2^117686637 is an apocalyptic number.

It is an amenable number.

117686637 is a deficient number, since it is larger than the sum of its proper divisors (55922643).

117686637 is a wasteful number, since it uses less digits than its factorization.

117686637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278272 (or 278269 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 117686637 is about 10848.3472013021. The cubic root of 117686637 is about 490.0522462686.

The spelling of 117686637 in words is "one hundred seventeen million, six hundred eighty-six thousand, six hundred thirty-seven".