561679361 has 2 divisors, whose sum is σ = 561679362. Its totient is φ = 561679360.

The previous prime is 561679333. The next prime is 561679403. The reversal of 561679361 is 163976165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 559038736 + 2640625 = 23644^2 + 1625^2 .

It is a cyclic number.

It is not a de Polignac number, because 561679361 - 2¹⁸ = 561417217 is a prime.

It is not a weakly prime, because it can be changed into another prime (561679561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280839680 + 280839681.

It is an arithmetic number, because the mean of its divisors is an integer number (280839681).

Almost surely, 2^561679361 is an apocalyptic number.

It is an amenable number.

561679361 is a deficient number, since it is larger than the sum of its proper divisors (1).

561679361 is an equidigital number, since it uses as much as digits as its factorization.

561679361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 561679361 is about 23699.7755474604. The cubic root of 561679361 is about 825.0801812489.

The spelling of 561679361 in words is "five hundred sixty-one million, six hundred seventy-nine thousand, three hundred sixty-one".