561732613 has 4 divisors (see below), whose sum is σ = 604942828. Its totient is φ = 518522400.

The previous prime is 561732599. The next prime is 561732641. The reversal of 561732613 is 316237165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222546724 + 339185889 = 14918^2 + 18417^2 .

It is a cyclic number.

It is not a de Polignac number, because 561732613 - 2²⁵ = 528178181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561732653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21605088 + ... + 21605113.

It is an arithmetic number, because the mean of its divisors is an integer number (151235707).

Almost surely, 2^561732613 is an apocalyptic number.

It is an amenable number.

561732613 is a deficient number, since it is larger than the sum of its proper divisors (43210215).

561732613 is a wasteful number, since it uses less digits than its factorization.

561732613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43210214.

The product of its digits is 22680, while the sum is 34.

The square root of 561732613 is about 23700.8989913885. The cubic root of 561732613 is about 825.1062553073.

Adding to 561732613 its reverse (316237165), we get a palindrome (877969778).

The spelling of 561732613 in words is "five hundred sixty-one million, seven hundred thirty-two thousand, six hundred thirteen".