564421723 has 2 divisors, whose sum is σ = 564421724. Its totient is φ = 564421722.

The previous prime is 564421721. The next prime is 564421747. The reversal of 564421723 is 327124465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 564421723 - 2¹ = 564421721 is a prime.

Together with 564421721, it forms a pair of twin primes.

It is equal to p_29561632 and since 564421723 and 29561632 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (564421721) 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 as a sum of consecutive naturals, namely, 282210861 + 282210862.

It is an arithmetic number, because the mean of its divisors is an integer number (282210862).

Almost surely, 2^564421723 is an apocalyptic number.

564421723 is a deficient number, since it is larger than the sum of its proper divisors (1).

564421723 is an equidigital number, since it uses as much as digits as its factorization.

564421723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 564421723 is about 23757.5613857988. The cubic root of 564421723 is about 826.4208014237.

The spelling of 564421723 in words is "five hundred sixty-four million, four hundred twenty-one thousand, seven hundred twenty-three".