117890761 has 2 divisors, whose sum is σ = 117890762. Its totient is φ = 117890760.

The previous prime is 117890741. The next prime is 117890789. The reversal of 117890761 is 167098711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117852736 + 38025 = 10856^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 117890761 - 2²³ = 109502153 is a prime.

It is not a weakly prime, because it can be changed into another prime (117890701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58945380 + 58945381.

It is an arithmetic number, because the mean of its divisors is an integer number (58945381).

Almost surely, 2^117890761 is an apocalyptic number.

It is an amenable number.

117890761 is a deficient number, since it is larger than the sum of its proper divisors (1).

117890761 is an equidigital number, since it uses as much as digits as its factorization.

117890761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 117890761 is about 10857.7511944233. The cubic root of 117890761 is about 490.3354096734.

The spelling of 117890761 in words is "one hundred seventeen million, eight hundred ninety thousand, seven hundred sixty-one".