117782915 has 4 divisors (see below), whose sum is σ = 141339504. Its totient is φ = 94226328.

The previous prime is 117782911. The next prime is 117782921. The reversal of 117782915 is 519287711.

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 117782915 - 2² = 117782911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117782911) 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, 11778287 + ... + 11778296.

It is an arithmetic number, because the mean of its divisors is an integer number (35334876).

Almost surely, 2^117782915 is an apocalyptic number.

117782915 is a deficient number, since it is larger than the sum of its proper divisors (23556589).

117782915 is an equidigital number, since it uses as much as digits as its factorization.

117782915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23556588.

The product of its digits is 35280, while the sum is 41.

The square root of 117782915 is about 10852.7837442750. The cubic root of 117782915 is about 490.1858450953.

The spelling of 117782915 in words is "one hundred seventeen million, seven hundred eighty-two thousand, nine hundred fifteen".