559661969 has 2 divisors, whose sum is σ = 559661970. Its totient is φ = 559661968.

The previous prime is 559661957. The next prime is 559661989. The reversal of 559661969 is 969166955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 557668225 + 1993744 = 23615^2 + 1412^2 .

It is a cyclic number.

It is not a de Polignac number, because 559661969 - 2²⁴ = 542884753 is a prime.

It is a super-2 number, since 2×559661969² = 626443039089913922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (559661939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 279830984 + 279830985.

It is an arithmetic number, because the mean of its divisors is an integer number (279830985).

Almost surely, 2^559661969 is an apocalyptic number.

It is an amenable number.

559661969 is a deficient number, since it is larger than the sum of its proper divisors (1).

559661969 is an equidigital number, since it uses as much as digits as its factorization.

559661969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3936600, while the sum is 56.

The square root of 559661969 is about 23657.1758458190. The cubic root of 559661969 is about 824.0911787005.

The spelling of 559661969 in words is "five hundred fifty-nine million, six hundred sixty-one thousand, nine hundred sixty-nine".