564557999 has 2 divisors, whose sum is σ = 564558000. Its totient is φ = 564557998.

The previous prime is 564557923. The next prime is 564558037. The reversal of 564557999 is 999755465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 564557999 - 2¹² = 564553903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564557099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282278999 + 282279000.

It is an arithmetic number, because the mean of its divisors is an integer number (282279000).

Almost surely, 2^564557999 is an apocalyptic number.

564557999 is a deficient number, since it is larger than the sum of its proper divisors (1).

564557999 is an equidigital number, since it uses as much as digits as its factorization.

564557999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15309000, while the sum is 59.

The square root of 564557999 is about 23760.4292680078. The cubic root of 564557999 is about 826.4873074031.

The spelling of 564557999 in words is "five hundred sixty-four million, five hundred fifty-seven thousand, nine hundred ninety-nine".