565415989 has 2 divisors, whose sum is σ = 565415990. Its totient is φ = 565415988.

The previous prime is 565415959. The next prime is 565415993. The reversal of 565415989 is 989514565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355020964 + 210395025 = 18842^2 + 14505^2 .

It is a cyclic number.

It is not a de Polignac number, because 565415989 - 2⁵ = 565415957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565415959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282707994 + 282707995.

It is an arithmetic number, because the mean of its divisors is an integer number (282707995).

Almost surely, 2^565415989 is an apocalyptic number.

It is an amenable number.

565415989 is a deficient number, since it is larger than the sum of its proper divisors (1).

565415989 is an equidigital number, since it uses as much as digits as its factorization.

565415989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944000, while the sum is 52.

The square root of 565415989 is about 23778.4774323336. The cubic root of 565415989 is about 826.9057816317.

The spelling of 565415989 in words is "five hundred sixty-five million, four hundred fifteen thousand, nine hundred eighty-nine".