561768439 has 2 divisors, whose sum is σ = 561768440. Its totient is φ = 561768438.

The previous prime is 561768437. The next prime is 561768457. The reversal of 561768439 is 934867165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561768439 - 2¹ = 561768437 is a prime.

Together with 561768437, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 561768392 and 561768401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561768437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280884219 + 280884220.

It is an arithmetic number, because the mean of its divisors is an integer number (280884220).

Almost surely, 2^561768439 is an apocalyptic number.

561768439 is a deficient number, since it is larger than the sum of its proper divisors (1).

561768439 is an equidigital number, since it uses as much as digits as its factorization.

561768439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 561768439 is about 23701.6547734541. The cubic root of 561768439 is about 825.1237960539.

The spelling of 561768439 in words is "five hundred sixty-one million, seven hundred sixty-eight thousand, four hundred thirty-nine".