564391 has 2 divisors, whose sum is σ = 564392. Its totient is φ = 564390.

The previous prime is 564373. The next prime is 564401. The reversal of 564391 is 193465.

564391 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 564391 - 2⁵ = 564359 is a prime.

564391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282195 + 282196.

It is an arithmetic number, because the mean of its divisors is an integer number (282196).

2⁵⁶⁴³⁹¹ is an apocalyptic number.

564391 is a deficient number, since it is larger than the sum of its proper divisors (1).

564391 is an equidigital number, since it uses as much as digits as its factorization.

564391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 564391 is about 751.2596089236. The cubic root of 564391 is about 82.6405806379.

The spelling of 564391 in words is "five hundred sixty-four thousand, three hundred ninety-one".