561699923 has 8 divisors (see below), whose sum is σ = 579430992. Its totient is φ = 544103136.

The previous prime is 561699893. The next prime is 561699949. The reversal of 561699923 is 329996165.

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 561699923 - 2⁸ = 561699667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561699623) 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, 25040 + ... + 41837.

It is an arithmetic number, because the mean of its divisors is an integer number (72428874).

Almost surely, 2^561699923 is an apocalyptic number.

561699923 is a deficient number, since it is larger than the sum of its proper divisors (17731069).

561699923 is a wasteful number, since it uses less digits than its factorization.

561699923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67141.

The product of its digits is 787320, while the sum is 50.

The square root of 561699923 is about 23700.2093450670. The cubic root of 561699923 is about 825.0902493250.

The spelling of 561699923 in words is "five hundred sixty-one million, six hundred ninety-nine thousand, nine hundred twenty-three".