561435197 has 2 divisors, whose sum is σ = 561435198. Its totient is φ = 561435196.

The previous prime is 561435191. The next prime is 561435223. The reversal of 561435197 is 791534165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526518916 + 34916281 = 22946^2 + 5909^2 .

It is a cyclic number.

It is not a de Polignac number, because 561435197 - 2⁸ = 561434941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561435191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280717598 + 280717599.

It is an arithmetic number, because the mean of its divisors is an integer number (280717599).

Almost surely, 2^561435197 is an apocalyptic number.

It is an amenable number.

561435197 is a deficient number, since it is larger than the sum of its proper divisors (1).

561435197 is an equidigital number, since it uses as much as digits as its factorization.

561435197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 561435197 is about 23694.6237995035. The cubic root of 561435197 is about 824.9606088324.

The spelling of 561435197 in words is "five hundred sixty-one million, four hundred thirty-five thousand, one hundred ninety-seven".