565499987 has 4 divisors (see below), whose sum is σ = 609000000. Its totient is φ = 521999976.

The previous prime is 565499981. The next prime is 565500007. The reversal of 565499987 is 789994565.

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 565499987 - 2⁸ = 565499731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565499981) 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, 21749987 + ... + 21750012.

It is an arithmetic number, because the mean of its divisors is an integer number (152250000).

Almost surely, 2^565499987 is an apocalyptic number.

565499987 is a deficient number, since it is larger than the sum of its proper divisors (43500013).

565499987 is a wasteful number, since it uses less digits than its factorization.

565499987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43500012.

The product of its digits is 24494400, while the sum is 62.

The square root of 565499987 is about 23780.2436278521. The cubic root of 565499987 is about 826.9467278812.

The spelling of 565499987 in words is "five hundred sixty-five million, four hundred ninety-nine thousand, nine hundred eighty-seven".