561504733 has 4 divisors (see below), whose sum is σ = 561606460. Its totient is φ = 561403008.

The previous prime is 561504721. The next prime is 561504787. The reversal of 561504733 is 337405165.

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 339554329 + 221950404 = 18427^2 + 14898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561504733 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 (561504133) 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, 42078 + ... + 53791.

It is an arithmetic number, because the mean of its divisors is an integer number (140401615).

Almost surely, 2^561504733 is an apocalyptic number.

It is an amenable number.

561504733 is a deficient number, since it is larger than the sum of its proper divisors (101727).

561504733 is an equidigital number, since it uses as much as digits as its factorization.

561504733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101726.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 561504733 is about 23696.0910911483. The cubic root of 561504733 is about 824.9946656527.

Adding to 561504733 its reverse (337405165), we get a palindrome (898909898).

The spelling of 561504733 in words is "five hundred sixty-one million, five hundred four thousand, seven hundred thirty-three".