561339293 has 2 divisors, whose sum is σ = 561339294. Its totient is φ = 561339292.

The previous prime is 561339239. The next prime is 561339301. The reversal of 561339293 is 392933165.

Together with previous prime (561339239) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543682489 + 17656804 = 23317^2 + 4202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561339293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561339293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561339193) 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, 280669646 + 280669647.

It is an arithmetic number, because the mean of its divisors is an integer number (280669647).

Almost surely, 2^561339293 is an apocalyptic number.

It is an amenable number.

561339293 is a deficient number, since it is larger than the sum of its proper divisors (1).

561339293 is an equidigital number, since it uses as much as digits as its factorization.

561339293 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 561339293 is about 23692.5999628576. The cubic root of 561339293 is about 824.9136330770.

The spelling of 561339293 in words is "five hundred sixty-one million, three hundred thirty-nine thousand, two hundred ninety-three".