561797 has 2 divisors, whose sum is σ = 561798. Its totient is φ = 561796.

The previous prime is 561787. The next prime is 561809. The reversal of 561797 is 797165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 450241 + 111556 = 671^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 561797 - 2⁶ = 561733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280898 + 280899.

It is an arithmetic number, because the mean of its divisors is an integer number (280899).

2⁵⁶¹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

561797 is a deficient number, since it is larger than the sum of its proper divisors (1).

561797 is an equidigital number, since it uses as much as digits as its factorization.

561797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 35.

The square root of 561797 is about 749.5311868095. The cubic root of 561797 is about 82.5137779254.

The spelling of 561797 in words is "five hundred sixty-one thousand, seven hundred ninety-seven".