117143731 has 6 divisors (see below), whose sum is σ = 121323332. Its totient is φ = 113103480.

The previous prime is 117143701. The next prime is 117143771. The reversal of 117143731 is 137341711.

It is not a de Polignac number, because 117143731 - 2⁷ = 117143603 is a prime.

It is a super-2 number, since 2×117143731² = 27445307425200722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117143731.

It is not an unprimeable number, because it can be changed into a prime (117143701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68805 + ... + 70486.

Almost surely, 2^117143731 is an apocalyptic number.

117143731 is a deficient number, since it is larger than the sum of its proper divisors (4179601).

117143731 is an equidigital number, since it uses as much as digits as its factorization.

117143731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139349 (or 139320 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 117143731 is about 10823.2957549907. The cubic root of 117143731 is about 489.2975231713.

The spelling of 117143731 in words is "one hundred seventeen million, one hundred forty-three thousand, seven hundred thirty-one".