117991245 has 16 divisors (see below), whose sum is σ = 188968320. Its totient is φ = 62867904.

The previous prime is 117991229. The next prime is 117991277. The reversal of 117991245 is 542199711.

It is not a de Polignac number, because 117991245 - 2⁴ = 117991229 is a prime.

It is a super-3 number, since 3×117991245³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15376 + ... + 21734.

It is an arithmetic number, because the mean of its divisors is an integer number (11810520).

Almost surely, 2^117991245 is an apocalyptic number.

117991245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117991245 is a deficient number, since it is larger than the sum of its proper divisors (70977075).

117991245 is a wasteful number, since it uses less digits than its factorization.

117991245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7604.

The product of its digits is 22680, while the sum is 39.

The square root of 117991245 is about 10862.3775021862. The cubic root of 117991245 is about 490.4746823099.

The spelling of 117991245 in words is "one hundred seventeen million, nine hundred ninety-one thousand, two hundred forty-five".