565638139 has 4 divisors (see below), whose sum is σ = 617059800. Its totient is φ = 514216480.

The previous prime is 565638131. The next prime is 565638179. The reversal of 565638139 is 931836565.

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 565638139 - 2³ = 565638131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565638131) 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, 25710814 + ... + 25710835.

It is an arithmetic number, because the mean of its divisors is an integer number (154264950).

Almost surely, 2^565638139 is an apocalyptic number.

565638139 is a deficient number, since it is larger than the sum of its proper divisors (51421661).

565638139 is a wasteful number, since it uses less digits than its factorization.

565638139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51421660.

The product of its digits is 583200, while the sum is 46.

The square root of 565638139 is about 23783.1482146498. The cubic root of 565638139 is about 827.0140635988.

The spelling of 565638139 in words is "five hundred sixty-five million, six hundred thirty-eight thousand, one hundred thirty-nine".