117601609 has 2 divisors, whose sum is σ = 117601610. Its totient is φ = 117601608.

The previous prime is 117601607. The next prime is 117601633. The reversal of 117601609 is 906106711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105678400 + 11923209 = 10280^2 + 3453^2 .

It is a cyclic number.

It is not a de Polignac number, because 117601609 - 2¹ = 117601607 is a prime.

Together with 117601607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117601607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58800804 + 58800805.

It is an arithmetic number, because the mean of its divisors is an integer number (58800805).

Almost surely, 2^117601609 is an apocalyptic number.

It is an amenable number.

117601609 is a deficient number, since it is larger than the sum of its proper divisors (1).

117601609 is an equidigital number, since it uses as much as digits as its factorization.

117601609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 117601609 is about 10844.4275552009. The cubic root of 117601609 is about 489.9341977444.

The spelling of 117601609 in words is "one hundred seventeen million, six hundred one thousand, six hundred nine".