117665087 has 4 divisors (see below), whose sum is σ = 117689016. Its totient is φ = 117641160.

The previous prime is 117665077. The next prime is 117665099. The reversal of 117665087 is 780566711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780566711 = 397 ⋅1966163.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117665087 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 (117665047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589 + ... + 15422.

It is an arithmetic number, because the mean of its divisors is an integer number (29422254).

Almost surely, 2^117665087 is an apocalyptic number.

117665087 is a deficient number, since it is larger than the sum of its proper divisors (23929).

117665087 is an equidigital number, since it uses as much as digits as its factorization.

117665087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23928.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 117665087 is about 10847.3539169698. The cubic root of 117665087 is about 490.0223327320.

The spelling of 117665087 in words is "one hundred seventeen million, six hundred sixty-five thousand, eighty-seven".