561339239 has 2 divisors, whose sum is σ = 561339240. Its totient is φ = 561339238.

The previous prime is 561339197. The next prime is 561339293. The reversal of 561339239 is 932933165.

Together with next prime (561339293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561339239 - 2¹² = 561335143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561339196 and 561339205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561339739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280669619 + 280669620.

It is an arithmetic number, because the mean of its divisors is an integer number (280669620).

Almost surely, 2^561339239 is an apocalyptic number.

561339239 is a deficient number, since it is larger than the sum of its proper divisors (1).

561339239 is an equidigital number, since it uses as much as digits as its factorization.

561339239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 41.

The square root of 561339239 is about 23692.5988232612. The cubic root of 561339239 is about 824.9136066251.

The spelling of 561339239 in words is "five hundred sixty-one million, three hundred thirty-nine thousand, two hundred thirty-nine".