117285987 has 32 divisors (see below), whose sum is σ = 193177600. Its totient is φ = 61637760.

The previous prime is 117285943. The next prime is 117286027. The reversal of 117285987 is 789582711.

It is a happy number.

It is not a de Polignac number, because 117285987 - 2⁸ = 117285731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117285587) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94662 + ... + 95892.

It is an arithmetic number, because the mean of its divisors is an integer number (6036800).

Almost surely, 2^117285987 is an apocalyptic number.

117285987 is a deficient number, since it is larger than the sum of its proper divisors (75891613).

117285987 is a wasteful number, since it uses less digits than its factorization.

117285987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603.

The product of its digits is 282240, while the sum is 48.

The square root of 117285987 is about 10829.8655116303. The cubic root of 117285987 is about 489.4955060288.

The spelling of 117285987 in words is "one hundred seventeen million, two hundred eighty-five thousand, nine hundred eighty-seven".