564021791 has 2 divisors, whose sum is σ = 564021792. Its totient is φ = 564021790.

The previous prime is 564021751. The next prime is 564021793. The reversal of 564021791 is 197120465.

564021791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 564021791 - 2⁶ = 564021727 is a prime.

Together with 564021793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564021793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282010895 + 282010896.

It is an arithmetic number, because the mean of its divisors is an integer number (282010896).

Almost surely, 2^564021791 is an apocalyptic number.

564021791 is a deficient number, since it is larger than the sum of its proper divisors (1).

564021791 is an equidigital number, since it uses as much as digits as its factorization.

564021791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 564021791 is about 23749.1429529573. The cubic root of 564021791 is about 826.2255631206.

The spelling of 564021791 in words is "five hundred sixty-four million, twenty-one thousand, seven hundred ninety-one".