117072831 has 4 divisors (see below), whose sum is σ = 156097112. Its totient is φ = 78048552.

The previous prime is 117072821. The next prime is 117072871. The reversal of 117072831 is 138270711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 117072831 - 2⁵ = 117072799 is a prime.

It is a super-2 number, since 2×117072831² = 27412095516709122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117072811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19512136 + ... + 19512141.

It is an arithmetic number, because the mean of its divisors is an integer number (39024278).

Almost surely, 2^117072831 is an apocalyptic number.

117072831 is a deficient number, since it is larger than the sum of its proper divisors (39024281).

117072831 is an equidigital number, since it uses as much as digits as its factorization.

117072831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39024280.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 117072831 is about 10820.0199168024. The cubic root of 117072831 is about 489.1987892050.

The spelling of 117072831 in words is "one hundred seventeen million, seventy-two thousand, eight hundred thirty-one".