561055597 has 2 divisors, whose sum is σ = 561055598. Its totient is φ = 561055596.

The previous prime is 561055571. The next prime is 561055619. The reversal of 561055597 is 795550165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339075396 + 221980201 = 18414^2 + 14899^2 .

It is a cyclic number.

It is not a de Polignac number, because 561055597 - 2¹⁵ = 561022829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561055567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280527798 + 280527799.

It is an arithmetic number, because the mean of its divisors is an integer number (280527799).

Almost surely, 2^561055597 is an apocalyptic number.

It is an amenable number.

561055597 is a deficient number, since it is larger than the sum of its proper divisors (1).

561055597 is an equidigital number, since it uses as much as digits as its factorization.

561055597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236250, while the sum is 43.

The square root of 561055597 is about 23686.6121891671. The cubic root of 561055597 is about 824.7746415991.

The spelling of 561055597 in words is "five hundred sixty-one million, fifty-five thousand, five hundred ninety-seven".