561491933 has 8 divisors (see below), whose sum is σ = 610110720. Its totient is φ = 514779840.

The previous prime is 561491921. The next prime is 561491951. The reversal of 561491933 is 339194165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561491933 - 2¹⁴ = 561475549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561491993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476060 + ... + 477237.

It is an arithmetic number, because the mean of its divisors is an integer number (76263840).

Almost surely, 2^561491933 is an apocalyptic number.

It is an amenable number.

561491933 is a deficient number, since it is larger than the sum of its proper divisors (48618787).

561491933 is a wasteful number, since it uses less digits than its factorization.

561491933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953347.

The product of its digits is 87480, while the sum is 41.

The square root of 561491933 is about 23695.8210028688. The cubic root of 561491933 is about 824.9883967759.

The spelling of 561491933 in words is "five hundred sixty-one million, four hundred ninety-one thousand, nine hundred thirty-three".