117651863 has 4 divisors (see below), whose sum is σ = 134459280. Its totient is φ = 100844448.

The previous prime is 117651847. The next prime is 117651881. The reversal of 117651863 is 368156711.

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 117651863 - 2⁴ = 117651847 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 (117651893) 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, 8403698 + ... + 8403711.

It is an arithmetic number, because the mean of its divisors is an integer number (33614820).

Almost surely, 2^117651863 is an apocalyptic number.

117651863 is a deficient number, since it is larger than the sum of its proper divisors (16807417).

117651863 is an equidigital number, since it uses as much as digits as its factorization.

117651863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807416.

The product of its digits is 30240, while the sum is 38.

The square root of 117651863 is about 10846.7443502647. The cubic root of 117651863 is about 490.0039747005.

The spelling of 117651863 in words is "one hundred seventeen million, six hundred fifty-one thousand, eight hundred sixty-three".