561335239 has 2 divisors, whose sum is σ = 561335240. Its totient is φ = 561335238.

The previous prime is 561335231. The next prime is 561335249. The reversal of 561335239 is 932533165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561335239 - 2³ = 561335231 is a prime.

It is equal to p_29408356 and since 561335239 and 29408356 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 561335198 and 561335207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561335231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280667619 + 280667620.

It is an arithmetic number, because the mean of its divisors is an integer number (280667620).

Almost surely, 2^561335239 is an apocalyptic number.

561335239 is a deficient number, since it is larger than the sum of its proper divisors (1).

561335239 is an equidigital number, since it uses as much as digits as its factorization.

561335239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 37.

The square root of 561335239 is about 23692.5144085637. The cubic root of 561335239 is about 824.9116472264.

The spelling of 561335239 in words is "five hundred sixty-one million, three hundred thirty-five thousand, two hundred thirty-nine".