117660687 has 4 divisors (see below), whose sum is σ = 156880920. Its totient is φ = 78440456.

The previous prime is 117660671. The next prime is 117660701. The reversal of 117660687 is 786066711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117660687 - 2⁴ = 117660671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117660287) 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 3 ways as a sum of consecutive naturals, for example, 19610112 + ... + 19610117.

It is an arithmetic number, because the mean of its divisors is an integer number (39220230).

Almost surely, 2^117660687 is an apocalyptic number.

117660687 is a deficient number, since it is larger than the sum of its proper divisors (39220233).

117660687 is an equidigital number, since it uses as much as digits as its factorization.

117660687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39220232.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 117660687 is about 10847.1511006347. The cubic root of 117660687 is about 490.0162246467.

The spelling of 117660687 in words is "one hundred seventeen million, six hundred sixty thousand, six hundred eighty-seven".