561257959 has 2 divisors, whose sum is σ = 561257960. Its totient is φ = 561257958.

The previous prime is 561257951. The next prime is 561257971. The reversal of 561257959 is 959752165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561257959 - 2³ = 561257951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561257951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280628979 + 280628980.

It is an arithmetic number, because the mean of its divisors is an integer number (280628980).

Almost surely, 2^561257959 is an apocalyptic number.

561257959 is a deficient number, since it is larger than the sum of its proper divisors (1).

561257959 is an equidigital number, since it uses as much as digits as its factorization.

561257959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 49.

The square root of 561257959 is about 23690.8834575665. The cubic root of 561257959 is about 824.8737898146.

The spelling of 561257959 in words is "five hundred sixty-one million, two hundred fifty-seven thousand, nine hundred fifty-nine".