116639609 has 2 divisors, whose sum is σ = 116639610. Its totient is φ = 116639608.

The previous prime is 116639587. The next prime is 116639623. The reversal of 116639609 is 906936611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 107584 = 10795^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 116639609 - 2⁸ = 116639353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (116639009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58319804 + 58319805.

It is an arithmetic number, because the mean of its divisors is an integer number (58319805).

Almost surely, 2^116639609 is an apocalyptic number.

It is an amenable number.

116639609 is a deficient number, since it is larger than the sum of its proper divisors (1).

116639609 is an equidigital number, since it uses as much as digits as its factorization.

116639609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 116639609 is about 10799.9818981330. The cubic root of 116639609 is about 488.5946250311.

The spelling of 116639609 in words is "one hundred sixteen million, six hundred thirty-nine thousand, six hundred nine".