117893913 has 4 divisors (see below), whose sum is σ = 157191888. Its totient is φ = 78595940.

The previous prime is 117893891. The next prime is 117893921. The reversal of 117893913 is 319398711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117893913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117893933) 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, 19648983 + ... + 19648988.

It is an arithmetic number, because the mean of its divisors is an integer number (39297972).

Almost surely, 2^117893913 is an apocalyptic number.

It is an amenable number.

117893913 is a deficient number, since it is larger than the sum of its proper divisors (39297975).

117893913 is an equidigital number, since it uses as much as digits as its factorization.

117893913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39297974.

The product of its digits is 40824, while the sum is 42.

The square root of 117893913 is about 10857.8963432149. The cubic root of 117893913 is about 490.3397796043.

The spelling of 117893913 in words is "one hundred seventeen million, eight hundred ninety-three thousand, nine hundred thirteen".