564123893 has 4 divisors (see below), whose sum is σ = 569600928. Its totient is φ = 558646860.

The previous prime is 564123887. The next prime is 564123977. The reversal of 564123893 is 398321465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-564123893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 564123893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564128893) 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, 2738363 + ... + 2738568.

It is an arithmetic number, because the mean of its divisors is an integer number (142400232).

Almost surely, 2^564123893 is an apocalyptic number.

It is an amenable number.

564123893 is a deficient number, since it is larger than the sum of its proper divisors (5477035).

564123893 is a wasteful number, since it uses less digits than its factorization.

564123893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477034.

The product of its digits is 155520, while the sum is 41.

The square root of 564123893 is about 23751.2924490437. The cubic root of 564123893 is about 826.2754159182.

The spelling of 564123893 in words is "five hundred sixty-four million, one hundred twenty-three thousand, eight hundred ninety-three".