117811687 has 8 divisors (see below), whose sum is σ = 138985472. Its totient is φ = 97723800.

The previous prime is 117811667. The next prime is 117811697. The reversal of 117811687 is 786118711.

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

It is a cyclic number.

It is not a de Polignac number, because 117811687 - 2²³ = 109423079 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 (117811637) 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, 271239 + ... + 271672.

It is an arithmetic number, because the mean of its divisors is an integer number (17373184).

Almost surely, 2^117811687 is an apocalyptic number.

117811687 is a deficient number, since it is larger than the sum of its proper divisors (21173785).

117811687 is an equidigital number, since it uses as much as digits as its factorization.

117811687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542949.

The product of its digits is 18816, while the sum is 40.

The square root of 117811687 is about 10854.1092218569. The cubic root of 117811687 is about 490.2257560305.

The spelling of 117811687 in words is "one hundred seventeen million, eight hundred eleven thousand, six hundred eighty-seven".