564430891 has 8 divisors (see below), whose sum is σ = 594908480. Its totient is φ = 534030408.

The previous prime is 564430877. The next prime is 564430897. The reversal of 564430891 is 198034465.

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 564430891 - 2²³ = 556042283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564430897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3921 + ... + 33826.

It is an arithmetic number, because the mean of its divisors is an integer number (74363560).

Almost surely, 2^564430891 is an apocalyptic number.

564430891 is a deficient number, since it is larger than the sum of its proper divisors (30477589).

564430891 is a wasteful number, since it uses less digits than its factorization.

564430891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38553.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 564430891 is about 23757.7543341116. The cubic root of 564430891 is about 826.4252759650.

The spelling of 564430891 in words is "five hundred sixty-four million, four hundred thirty thousand, eight hundred ninety-one".