689385565 has 8 divisors (see below), whose sum is σ = 902468448. Its totient is φ = 501371280.

The previous prime is 689385563. The next prime is 689385611. The reversal of 689385565 is 565583986.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 689385565 - 2¹ = 689385563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 12534283 = 689385565 / (6 + 8 + 9 + 3 + 8 + 5 + 5 + 6 + 5).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689385563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6267087 + ... + 6267196.

It is an arithmetic number, because the mean of its divisors is an integer number (112808556).

Almost surely, 2^689385565 is an apocalyptic number.

It is an amenable number.

689385565 is a deficient number, since it is larger than the sum of its proper divisors (213082883).

689385565 is a wasteful number, since it uses less digits than its factorization.

689385565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12534299.

The product of its digits is 7776000, while the sum is 55.

The square root of 689385565 is about 26256.1528979399. The cubic root of 689385565 is about 883.3932201793.

The spelling of 689385565 in words is "six hundred eighty-nine million, three hundred eighty-five thousand, five hundred sixty-five".