115605569 has 2 divisors, whose sum is σ = 115605570. Its totient is φ = 115605568.

The previous prime is 115605467. The next prime is 115605601. The reversal of 115605569 is 965506511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115455025 + 150544 = 10745^2 + 388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115605569 is a prime.

It is a super-2 number, since 2×115605569² = 26729295167627522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115605769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57802784 + 57802785.

It is an arithmetic number, because the mean of its divisors is an integer number (57802785).

Almost surely, 2^115605569 is an apocalyptic number.

It is an amenable number.

115605569 is a deficient number, since it is larger than the sum of its proper divisors (1).

115605569 is an equidigital number, since it uses as much as digits as its factorization.

115605569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 115605569 is about 10752.0030226930. The cubic root of 115605569 is about 487.1464984058.

The spelling of 115605569 in words is "one hundred fifteen million, six hundred five thousand, five hundred sixty-nine".