113659561 has 2 divisors, whose sum is σ = 113659562. Its totient is φ = 113659560.

The previous prime is 113659543. The next prime is 113659607. The reversal of 113659561 is 165956311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102637161 + 11022400 = 10131^2 + 3320^2 .

It is an emirp because it is prime and its reverse (165956311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113659561 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113659561.

It is not a weakly prime, because it can be changed into another prime (113659541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56829780 + 56829781.

It is an arithmetic number, because the mean of its divisors is an integer number (56829781).

Almost surely, 2^113659561 is an apocalyptic number.

It is an amenable number.

113659561 is a deficient number, since it is larger than the sum of its proper divisors (1).

113659561 is an equidigital number, since it uses as much as digits as its factorization.

113659561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 37.

The square root of 113659561 is about 10661.1238150581. The cubic root of 113659561 is about 484.3976097167.

The spelling of 113659561 in words is "one hundred thirteen million, six hundred fifty-nine thousand, five hundred sixty-one".