561919097 has 2 divisors, whose sum is σ = 561919098. Its totient is φ = 561919096.

The previous prime is 561919019. The next prime is 561919103. The reversal of 561919097 is 790919165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321700096 + 240219001 = 17936^2 + 15499^2 .

It is a cyclic number.

It is not a de Polignac number, because 561919097 - 2²⁰ = 560870521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561919297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280959548 + 280959549.

It is an arithmetic number, because the mean of its divisors is an integer number (280959549).

Almost surely, 2^561919097 is an apocalyptic number.

It is an amenable number.

561919097 is a deficient number, since it is larger than the sum of its proper divisors (1).

561919097 is an equidigital number, since it uses as much as digits as its factorization.

561919097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 47.

The square root of 561919097 is about 23704.8327773051. The cubic root of 561919097 is about 825.1975514669.

The spelling of 561919097 in words is "five hundred sixty-one million, nine hundred nineteen thousand, ninety-seven".