564727987 has 4 divisors (see below), whose sum is σ = 577861240. Its totient is φ = 551594736.

The previous prime is 564727967. The next prime is 564728011. The reversal of 564727987 is 789727465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 564727987 - 2⁷ = 564727859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564727967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6566562 + ... + 6566647.

It is an arithmetic number, because the mean of its divisors is an integer number (144465310).

Almost surely, 2^564727987 is an apocalyptic number.

564727987 is a deficient number, since it is larger than the sum of its proper divisors (13133253).

564727987 is a wasteful number, since it uses less digits than its factorization.

564727987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13133252.

The product of its digits is 5927040, while the sum is 55.

The square root of 564727987 is about 23764.0061227058. The cubic root of 564727987 is about 826.5702506533.

The spelling of 564727987 in words is "five hundred sixty-four million, seven hundred twenty-seven thousand, nine hundred eighty-seven".