561622697 has 2 divisors, whose sum is σ = 561622698. Its totient is φ = 561622696.

The previous prime is 561622687. The next prime is 561622723. The reversal of 561622697 is 796226165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 557951641 + 3671056 = 23621^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 561622697 - 2¹² = 561618601 is a prime.

It is not a weakly prime, because it can be changed into another prime (561622637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280811348 + 280811349.

It is an arithmetic number, because the mean of its divisors is an integer number (280811349).

Almost surely, 2^561622697 is an apocalyptic number.

It is an amenable number.

561622697 is a deficient number, since it is larger than the sum of its proper divisors (1).

561622697 is an equidigital number, since it uses as much as digits as its factorization.

561622697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 561622697 is about 23698.5800629489. The cubic root of 561622697 is about 825.0524347451.

The spelling of 561622697 in words is "five hundred sixty-one million, six hundred twenty-two thousand, six hundred ninety-seven".