117889961 has 8 divisors (see below), whose sum is σ = 137865024. Its totient is φ = 98698320.

The previous prime is 117889957. The next prime is 117889979. The reversal of 117889961 is 169988711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117889961 - 2² = 117889957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117889991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195530 + ... + 196131.

It is an arithmetic number, because the mean of its divisors is an integer number (17233128).

Almost surely, 2^117889961 is an apocalyptic number.

It is an amenable number.

117889961 is a deficient number, since it is larger than the sum of its proper divisors (19975063).

117889961 is an equidigital number, since it uses as much as digits as its factorization.

117889961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391711.

The product of its digits is 217728, while the sum is 50.

The square root of 117889961 is about 10857.7143543197. The cubic root of 117889961 is about 490.3343005415.

The spelling of 117889961 in words is "one hundred seventeen million, eight hundred eighty-nine thousand, nine hundred sixty-one".