564027721 has 4 divisors (see below), whose sum is σ = 564321744. Its totient is φ = 563733700.

The previous prime is 564027713. The next prime is 564027727. The reversal of 564027721 is 127720465.

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 not a de Polignac number, because 564027721 - 2³ = 564027713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564027727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144115 + ... + 147976.

It is an arithmetic number, because the mean of its divisors is an integer number (141080436).

Almost surely, 2^564027721 is an apocalyptic number.

It is an amenable number.

564027721 is a deficient number, since it is larger than the sum of its proper divisors (294023).

564027721 is a wasteful number, since it uses less digits than its factorization.

564027721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294022.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 564027721 is about 23749.2677992396. The cubic root of 564027721 is about 826.2284586946.

The spelling of 564027721 in words is "five hundred sixty-four million, twenty-seven thousand, seven hundred twenty-one".