117487831 has 4 divisors (see below), whose sum is σ = 117581112. Its totient is φ = 117394552.

The previous prime is 117487823. The next prime is 117487847. The reversal of 117487831 is 138784711.

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

It is a cyclic number.

It is not a de Polignac number, because 117487831 - 2³ = 117487823 is a prime.

It is a super-2 number, since 2×117487831² = 27606780866169122, 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 (117487801) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 44725 + ... + 47278.

It is an arithmetic number, because the mean of its divisors is an integer number (29395278).

Almost surely, 2^117487831 is an apocalyptic number.

117487831 is a deficient number, since it is larger than the sum of its proper divisors (93281).

117487831 is an equidigital number, since it uses as much as digits as its factorization.

117487831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93280.

The product of its digits is 37632, while the sum is 40.

The square root of 117487831 is about 10839.1803656919. The cubic root of 117487831 is about 489.7761451452.

The spelling of 117487831 in words is "one hundred seventeen million, four hundred eighty-seven thousand, eight hundred thirty-one".