564261973 has 4 divisors (see below), whose sum is σ = 615558528. Its totient is φ = 512965420.

The previous prime is 564261959. The next prime is 564261983. The reversal of 564261973 is 379162465.

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 de Polignac number, because none of the positive numbers 2^k-564261973 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 (564261923) 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, 25648261 + ... + 25648282.

It is an arithmetic number, because the mean of its divisors is an integer number (153889632).

Almost surely, 2^564261973 is an apocalyptic number.

It is an amenable number.

564261973 is a deficient number, since it is larger than the sum of its proper divisors (51296555).

564261973 is a wasteful number, since it uses less digits than its factorization.

564261973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51296554.

The product of its digits is 272160, while the sum is 43.

The square root of 564261973 is about 23754.1990603767. The cubic root of 564261973 is about 826.3428259342.

The spelling of 564261973 in words is "five hundred sixty-four million, two hundred sixty-one thousand, nine hundred seventy-three".