117665990 has 16 divisors (see below), whose sum is σ = 228091248. Its totient is φ = 43445856.

The previous prime is 117665981. The next prime is 117666007. The reversal of 117665990 is 99566711.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452432 + ... + 452691.

It is an arithmetic number, because the mean of its divisors is an integer number (14255703).

Almost surely, 2^117665990 is an apocalyptic number.

117665990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117665990 is a deficient number, since it is larger than the sum of its proper divisors (110425258).

117665990 is a wasteful number, since it uses less digits than its factorization.

117665990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905143.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 117665990 is about 10847.3955399441. The cubic root of 117665990 is about 490.0235862588.

The spelling of 117665990 in words is "one hundred seventeen million, six hundred sixty-five thousand, nine hundred ninety".