117961091 has 2 divisors, whose sum is σ = 117961092. Its totient is φ = 117961090.

The previous prime is 117961061. The next prime is 117961111. The reversal of 117961091 is 190169711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117961091 - 2¹⁸ = 117698947 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (117961061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58980545 + 58980546.

It is an arithmetic number, because the mean of its divisors is an integer number (58980546).

Almost surely, 2^117961091 is an apocalyptic number.

117961091 is a deficient number, since it is larger than the sum of its proper divisors (1).

117961091 is an equidigital number, since it uses as much as digits as its factorization.

117961091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 35.

The square root of 117961091 is about 10860.9894116512. The cubic root of 117961091 is about 490.4328966287.

The spelling of 117961091 in words is "one hundred seventeen million, nine hundred sixty-one thousand, ninety-one".