117578831 has 2 divisors, whose sum is σ = 117578832. Its totient is φ = 117578830.

The previous prime is 117578827. The next prime is 117578861. The reversal of 117578831 is 138875711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117578831 - 2² = 117578827 is a prime.

It is a super-2 number, since 2×117578831² = 27649562998653122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117578861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58789415 + 58789416.

It is an arithmetic number, because the mean of its divisors is an integer number (58789416).

Almost surely, 2^117578831 is an apocalyptic number.

117578831 is a deficient number, since it is larger than the sum of its proper divisors (1).

117578831 is an equidigital number, since it uses as much as digits as its factorization.

117578831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 41.

The square root of 117578831 is about 10843.3772875428. The cubic root of 117578831 is about 489.9025642720.

The spelling of 117578831 in words is "one hundred seventeen million, five hundred seventy-eight thousand, eight hundred thirty-one".