117685287 has 12 divisors (see below), whose sum is σ = 172777384. Its totient is φ = 77170320.

The previous prime is 117685261. The next prime is 117685289. The reversal of 117685287 is 782586711.

It is a happy number.

117685287 is a `hidden beast` number, since 117 + 6 + 8 + 528 + 7 = 666.

It is not a de Polignac number, because 117685287 - 2¹⁰ = 117684263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117685289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106633 + ... + 107730.

Almost surely, 2^117685287 is an apocalyptic number.

117685287 is a deficient number, since it is larger than the sum of its proper divisors (55092097).

117685287 is a wasteful number, since it uses less digits than its factorization.

117685287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214430 (or 214427 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 117685287 is about 10848.2849796638. The cubic root of 117685287 is about 490.0503724419.

The spelling of 117685287 in words is "one hundred seventeen million, six hundred eighty-five thousand, two hundred eighty-seven".