565110989 has 4 divisors (see below), whose sum is σ = 589681056. Its totient is φ = 540540924.

The previous prime is 565110979. The next prime is 565111009. The reversal of 565110989 is 989011565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989011565 = 5 ⋅197802313.

It is a cyclic number.

It is not a de Polignac number, because 565110989 - 2²⁰ = 564062413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565110979) 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, 12284999 + ... + 12285044.

It is an arithmetic number, because the mean of its divisors is an integer number (147420264).

Almost surely, 2^565110989 is an apocalyptic number.

It is an amenable number.

565110989 is a deficient number, since it is larger than the sum of its proper divisors (24570067).

565110989 is a wasteful number, since it uses less digits than its factorization.

565110989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24570066.

The product of its (nonzero) digits is 97200, while the sum is 44.

The square root of 565110989 is about 23772.0632045264. The cubic root of 565110989 is about 826.7570701044.

The spelling of 565110989 in words is "five hundred sixty-five million, one hundred ten thousand, nine hundred eighty-nine".