564826421 has 2 divisors, whose sum is σ = 564826422. Its totient is φ = 564826420.

The previous prime is 564826403. The next prime is 564826447. The reversal of 564826421 is 124628465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538704100 + 26122321 = 23210^2 + 5111^2 .

It is a cyclic number.

It is not a de Polignac number, because 564826421 - 2¹⁰ = 564825397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564826021) 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, 282413210 + 282413211.

It is an arithmetic number, because the mean of its divisors is an integer number (282413211).

Almost surely, 2^564826421 is an apocalyptic number.

It is an amenable number.

564826421 is a deficient number, since it is larger than the sum of its proper divisors (1).

564826421 is an equidigital number, since it uses as much as digits as its factorization.

564826421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 38.

The square root of 564826421 is about 23766.0771058246. The cubic root of 564826421 is about 826.6182725276.

The spelling of 564826421 in words is "five hundred sixty-four million, eight hundred twenty-six thousand, four hundred twenty-one".