564450391 has 2 divisors, whose sum is σ = 564450392. Its totient is φ = 564450390.

The previous prime is 564450389. The next prime is 564450431. The reversal of 564450391 is 193054465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 564450391 - 2¹ = 564450389 is a prime.

Together with 564450389, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 564450391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564450301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282225195 + 282225196.

It is an arithmetic number, because the mean of its divisors is an integer number (282225196).

Almost surely, 2^564450391 is an apocalyptic number.

564450391 is a deficient number, since it is larger than the sum of its proper divisors (1).

564450391 is an equidigital number, since it uses as much as digits as its factorization.

564450391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 564450391 is about 23758.1647228905. The cubic root of 564450391 is about 826.4347929892.

The spelling of 564450391 in words is "five hundred sixty-four million, four hundred fifty thousand, three hundred ninety-one".