117511687 has 2 divisors, whose sum is σ = 117511688. Its totient is φ = 117511686.

The previous prime is 117511679. The next prime is 117511697. The reversal of 117511687 is 786115711.

It is a weak prime.

It is an emirp because it is prime and its reverse (786115711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117511687 - 2³ = 117511679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117511627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58755843 + 58755844.

It is an arithmetic number, because the mean of its divisors is an integer number (58755844).

Almost surely, 2^117511687 is an apocalyptic number.

117511687 is a deficient number, since it is larger than the sum of its proper divisors (1).

117511687 is an equidigital number, since it uses as much as digits as its factorization.

117511687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 37.

The square root of 117511687 is about 10840.2807620467. The cubic root of 117511687 is about 489.8092927171.

The spelling of 117511687 in words is "one hundred seventeen million, five hundred eleven thousand, six hundred eighty-seven".