117651902 has 4 divisors (see below), whose sum is σ = 176477856. Its totient is φ = 58825950.

The previous prime is 117651893. The next prime is 117651907. The reversal of 117651902 is 209156711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 209156711 = 59 ⋅3545029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117651907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29412974 + ... + 29412977.

It is an arithmetic number, because the mean of its divisors is an integer number (44119464).

Almost surely, 2^117651902 is an apocalyptic number.

117651902 is a deficient number, since it is larger than the sum of its proper divisors (58825954).

117651902 is an equidigital number, since it uses as much as digits as its factorization.

117651902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58825953.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 117651902 is about 10846.7461480391. The cubic root of 117651902 is about 490.0040288437.

The spelling of 117651902 in words is "one hundred seventeen million, six hundred fifty-one thousand, nine hundred two".