561504269 has 2 divisors, whose sum is σ = 561504270. Its totient is φ = 561504268.

The previous prime is 561504259. The next prime is 561504289. The reversal of 561504269 is 962405165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 545783044 + 15721225 = 23362^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 561504269 - 2²⁸ = 293068813 is a prime.

It is a super-2 number, since 2×561504269² = 630574088210448722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561504259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280752134 + 280752135.

It is an arithmetic number, because the mean of its divisors is an integer number (280752135).

Almost surely, 2^561504269 is an apocalyptic number.

It is an amenable number.

561504269 is a deficient number, since it is larger than the sum of its proper divisors (1).

561504269 is an equidigital number, since it uses as much as digits as its factorization.

561504269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 561504269 is about 23696.0813005020. The cubic root of 561504269 is about 824.9944384076.

The spelling of 561504269 in words is "five hundred sixty-one million, five hundred four thousand, two hundred sixty-nine".