117311591 has 2 divisors, whose sum is σ = 117311592. Its totient is φ = 117311590.

The previous prime is 117311563. The next prime is 117311629. The reversal of 117311591 is 195113711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117311591 - 2¹⁴ = 117295207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117311501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58655795 + 58655796.

It is an arithmetic number, because the mean of its divisors is an integer number (58655796).

Almost surely, 2^117311591 is an apocalyptic number.

117311591 is a deficient number, since it is larger than the sum of its proper divisors (1).

117311591 is an equidigital number, since it uses as much as digits as its factorization.

117311591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945, while the sum is 29.

The square root of 117311591 is about 10831.0475485984. The cubic root of 117311591 is about 489.5311230460.

The spelling of 117311591 in words is "one hundred seventeen million, three hundred eleven thousand, five hundred ninety-one".