571664887 has 2 divisors, whose sum is σ = 571664888. Its totient is φ = 571664886.

The previous prime is 571664861. The next prime is 571664923. The reversal of 571664887 is 788466175.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 571664887 - 2⁷ = 571664759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (571664827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285832443 + 285832444.

It is an arithmetic number, because the mean of its divisors is an integer number (285832444).

Almost surely, 2^571664887 is an apocalyptic number.

571664887 is a deficient number, since it is larger than the sum of its proper divisors (1).

571664887 is an equidigital number, since it uses as much as digits as its factorization.

571664887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 52.

The square root of 571664887 is about 23909.5145705637. The cubic root of 571664887 is about 829.9409098108.

The spelling of 571664887 in words is "five hundred seventy-one million, six hundred sixty-four thousand, eight hundred eighty-seven".