113669561 has 2 divisors, whose sum is σ = 113669562. Its totient is φ = 113669560.

The previous prime is 113669551. The next prime is 113669573. The reversal of 113669561 is 165966311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104427961 + 9241600 = 10219^2 + 3040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113669561 is a prime.

It is not a weakly prime, because it can be changed into another prime (113669551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56834780 + 56834781.

It is an arithmetic number, because the mean of its divisors is an integer number (56834781).

Almost surely, 2^113669561 is an apocalyptic number.

It is an amenable number.

113669561 is a deficient number, since it is larger than the sum of its proper divisors (1).

113669561 is an equidigital number, since it uses as much as digits as its factorization.

113669561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The square root of 113669561 is about 10661.5927984518. The cubic root of 113669561 is about 484.4118153967.

The spelling of 113669561 in words is "one hundred thirteen million, six hundred sixty-nine thousand, five hundred sixty-one".