561704997 has 16 divisors (see below), whose sum is σ = 867658880. Its totient is φ = 316576512.

The previous prime is 561704993. The next prime is 561705097. The reversal of 561704997 is 799407165.

It is a happy number.

It is not a de Polignac number, because 561704997 - 2² = 561704993 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561704993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181672 + ... + 184737.

It is an arithmetic number, because the mean of its divisors is an integer number (54228680).

Almost surely, 2^561704997 is an apocalyptic number.

It is an amenable number.

561704997 is a deficient number, since it is larger than the sum of its proper divisors (305953883).

561704997 is a wasteful number, since it uses less digits than its factorization.

561704997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366492.

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 561704997 is about 23700.3163902932. The cubic root of 561704997 is about 825.0927337449.

The spelling of 561704997 in words is "five hundred sixty-one million, seven hundred four thousand, nine hundred ninety-seven".