564261623 has 4 divisors (see below), whose sum is σ = 565470360. Its totient is φ = 563052888.

The previous prime is 564261547. The next prime is 564261631. The reversal of 564261623 is 326162465.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326162465 = 5 ⋅65232493.

It is a cyclic number.

It is not a de Polignac number, because 564261623 - 2¹² = 564257527 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 (564261823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603668 + ... + 604601.

It is an arithmetic number, because the mean of its divisors is an integer number (141367590).

Almost surely, 2^564261623 is an apocalyptic number.

564261623 is a deficient number, since it is larger than the sum of its proper divisors (1208737).

564261623 is a wasteful number, since it uses less digits than its factorization.

564261623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208736.

The product of its digits is 51840, while the sum is 35.

The square root of 564261623 is about 23754.1916932570. The cubic root of 564261623 is about 826.3426550798.

The spelling of 564261623 in words is "five hundred sixty-four million, two hundred sixty-one thousand, six hundred twenty-three".