117572985 has 16 divisors (see below), whose sum is σ = 209018880. Its totient is φ = 62705520.

The previous prime is 117572977. The next prime is 117572999. The reversal of 117572985 is 589275711.

It is not a de Polignac number, because 117572985 - 2³ = 117572977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117572985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435321 + ... + 435590.

It is an arithmetic number, because the mean of its divisors is an integer number (13063680).

Almost surely, 2^117572985 is an apocalyptic number.

117572985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117572985 is a deficient number, since it is larger than the sum of its proper divisors (91445895).

117572985 is an equidigital number, since it uses as much as digits as its factorization.

117572985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870925 (or 870919 counting only the distinct ones).

The product of its digits is 176400, while the sum is 45.

The square root of 117572985 is about 10843.1077187308. The cubic root of 117572985 is about 489.8944448460.

The spelling of 117572985 in words is "one hundred seventeen million, five hundred seventy-two thousand, nine hundred eighty-five".