117890986 has 8 divisors (see below), whose sum is σ = 177963300. Its totient is φ = 58569888.

The previous prime is 117890977. The next prime is 117891049. The reversal of 117890986 is 689098711.

It can be written as a sum of positive squares in 2 ways, for example, as 108472225 + 9418761 = 10415^2 + 3069^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187411 + ... + 188038.

Almost surely, 2^117890986 is an apocalyptic number.

117890986 is a deficient number, since it is larger than the sum of its proper divisors (60072314).

117890986 is a wasteful number, since it uses less digits than its factorization.

117890986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375608.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 117890986 is about 10857.7615556799. The cubic root of 117890986 is about 490.3357216159.

The spelling of 117890986 in words is "one hundred seventeen million, eight hundred ninety thousand, nine hundred eighty-six".