117788015 has 4 divisors (see below), whose sum is σ = 141345624. Its totient is φ = 94230408.

The previous prime is 117788009. The next prime is 117788017. The reversal of 117788015 is 510887711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510887711 = 1033 ⋅494567.

It is a cyclic number.

It is not a de Polignac number, because 117788015 - 2⁸ = 117787759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117788015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117788017) 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, 11778797 + ... + 11778806.

It is an arithmetic number, because the mean of its divisors is an integer number (35336406).

Almost surely, 2^117788015 is an apocalyptic number.

117788015 is a deficient number, since it is larger than the sum of its proper divisors (23557609).

117788015 is an equidigital number, since it uses as much as digits as its factorization.

117788015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23557608.

The product of its (nonzero) digits is 15680, while the sum is 38.

The square root of 117788015 is about 10853.0187044895. The cubic root of 117788015 is about 490.1929200086.

It can be divided in two parts, 11778 and 8015, that multiplied together give a triangular number (94400670 = T₁₃₇₄₀).

The spelling of 117788015 in words is "one hundred seventeen million, seven hundred eighty-eight thousand, fifteen".