564769421 has 4 divisors (see below), whose sum is σ = 566192412. Its totient is φ = 563346432.

The previous prime is 564769397. The next prime is 564769423. The reversal of 564769421 is 124967465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465049225 + 99720196 = 21565^2 + 9986^2 .

It is a cyclic number.

It is not a de Polignac number, because 564769421 - 2¹⁸ = 564507277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564769423) 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, 710900 + ... + 711693.

It is an arithmetic number, because the mean of its divisors is an integer number (141548103).

Almost surely, 2^564769421 is an apocalyptic number.

It is an amenable number.

564769421 is a deficient number, since it is larger than the sum of its proper divisors (1422991).

564769421 is a wasteful number, since it uses less digits than its factorization.

564769421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422990.

The product of its digits is 362880, while the sum is 44.

The square root of 564769421 is about 23764.8778873362. The cubic root of 564769421 is about 826.5904652669.

The spelling of 564769421 in words is "five hundred sixty-four million, seven hundred sixty-nine thousand, four hundred twenty-one".