564421237 has 2 divisors, whose sum is σ = 564421238. Its totient is φ = 564421236.

The previous prime is 564421183. The next prime is 564421271. The reversal of 564421237 is 732124465.

It is an a-pointer prime, because the next prime (564421271) can be obtained adding 564421237 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498584241 + 65836996 = 22329^2 + 8114^2 .

It is a cyclic number.

It is not a de Polignac number, because 564421237 - 2¹⁵ = 564388469 is a prime.

It is a super-2 number, since 2×564421237² = 637142665553220338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564491237) 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, 282210618 + 282210619.

It is an arithmetic number, because the mean of its divisors is an integer number (282210619).

Almost surely, 2^564421237 is an apocalyptic number.

It is an amenable number.

564421237 is a deficient number, since it is larger than the sum of its proper divisors (1).

564421237 is an equidigital number, since it uses as much as digits as its factorization.

564421237 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 564421237 is about 23757.5511574741. The cubic root of 564421237 is about 826.4205642248.

The spelling of 564421237 in words is "five hundred sixty-four million, four hundred twenty-one thousand, two hundred thirty-seven".