117805231 has 2 divisors, whose sum is σ = 117805232. Its totient is φ = 117805230.

The previous prime is 117805201. The next prime is 117805253. The reversal of 117805231 is 132508711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117805231 - 2⁵ = 117805199 is a prime.

It is a super-2 number, since 2×117805231² = 27756144901926722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 117805231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117805201) 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 as a sum of consecutive naturals, namely, 58902615 + 58902616.

It is an arithmetic number, because the mean of its divisors is an integer number (58902616).

Almost surely, 2^117805231 is an apocalyptic number.

117805231 is a deficient number, since it is larger than the sum of its proper divisors (1).

117805231 is an equidigital number, since it uses as much as digits as its factorization.

117805231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 117805231 is about 10853.8118188957. The cubic root of 117805231 is about 490.2168011881.

The spelling of 117805231 in words is "one hundred seventeen million, eight hundred five thousand, two hundred thirty-one".