561252623 has 2 divisors, whose sum is σ = 561252624. Its totient is φ = 561252622.

The previous prime is 561252619. The next prime is 561252683. The reversal of 561252623 is 326252165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561252623 - 2² = 561252619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561252623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561252683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280626311 + 280626312.

It is an arithmetic number, because the mean of its divisors is an integer number (280626312).

Almost surely, 2^561252623 is an apocalyptic number.

561252623 is a deficient number, since it is larger than the sum of its proper divisors (1).

561252623 is an equidigital number, since it uses as much as digits as its factorization.

561252623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 561252623 is about 23690.7708401394. The cubic root of 561252623 is about 824.8711757222.

The spelling of 561252623 in words is "five hundred sixty-one million, two hundred fifty-two thousand, six hundred twenty-three".