117087985 has 16 divisors (see below), whose sum is σ = 162781056. Its totient is φ = 79187328.

The previous prime is 117087947. The next prime is 117087991. The reversal of 117087985 is 589780711.

It is a cyclic number.

It is not a de Polignac number, because 117087985 - 2¹¹ = 117085937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20359 + ... + 25468.

It is an arithmetic number, because the mean of its divisors is an integer number (10173816).

Almost surely, 2^117087985 is an apocalyptic number.

It is an amenable number.

117087985 is a deficient number, since it is larger than the sum of its proper divisors (45693071).

117087985 is an equidigital number, since it uses as much as digits as its factorization.

117087985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45912.

The product of its (nonzero) digits is 141120, while the sum is 46.

The square root of 117087985 is about 10820.7201701181. The cubic root of 117087985 is about 489.2198957207.

The spelling of 117087985 in words is "one hundred seventeen million, eighty-seven thousand, nine hundred eighty-five".