561423957 has 8 divisors (see below), whose sum is σ = 751835040. Its totient is φ = 372647760.

The previous prime is 561423943. The next prime is 561423979. The reversal of 561423957 is 759324165.

561423957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 561423957 - 2⁶ = 561423893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561423917) 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, 407919 + ... + 409292.

It is an arithmetic number, because the mean of its divisors is an integer number (93979380).

Almost surely, 2^561423957 is an apocalyptic number.

It is an amenable number.

561423957 is a deficient number, since it is larger than the sum of its proper divisors (190411083).

561423957 is a wasteful number, since it uses less digits than its factorization.

561423957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817443.

The product of its digits is 226800, while the sum is 42.

The square root of 561423957 is about 23694.3866137109. The cubic root of 561423957 is about 824.9551035256.

The spelling of 561423957 in words is "five hundred sixty-one million, four hundred twenty-three thousand, nine hundred fifty-seven".