117663813 has 16 divisors (see below), whose sum is σ = 176117760. Its totient is φ = 77632128.

The previous prime is 117663779. The next prime is 117663823. The reversal of 117663813 is 318366711.

117663813 is a `hidden beast` number, since 1 + 1 + 7 + 6 + 638 + 13 = 666.

It is not a de Polignac number, because 117663813 - 2²⁵ = 84109381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117663823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19845 + ... + 25082.

It is an arithmetic number, because the mean of its divisors is an integer number (11007360).

Almost surely, 2^117663813 is an apocalyptic number.

It is an amenable number.

117663813 is a deficient number, since it is larger than the sum of its proper divisors (58453947).

117663813 is an equidigital number, since it uses as much as digits as its factorization.

117663813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45033 (or 45027 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 117663813 is about 10847.2951928119. The cubic root of 117663813 is about 490.0205641793.

The spelling of 117663813 in words is "one hundred seventeen million, six hundred sixty-three thousand, eight hundred thirteen".