689337965 has 4 divisors (see below), whose sum is σ = 827205564. Its totient is φ = 551470368.

The previous prime is 689337959. The next prime is 689337967. The reversal of 689337965 is 569733986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569733986 = 2 ⋅284866993.

It can be written as a sum of positive squares in 2 ways, for example, as 529644196 + 159693769 = 23014^2 + 12637^2 .

It is a cyclic number.

It is not a de Polignac number, because 689337965 - 2⁴ = 689337949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689337965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689337967) 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, 68933792 + ... + 68933801.

It is an arithmetic number, because the mean of its divisors is an integer number (206801391).

Almost surely, 2^689337965 is an apocalyptic number.

It is an amenable number.

689337965 is a deficient number, since it is larger than the sum of its proper divisors (137867599).

689337965 is a wasteful number, since it uses less digits than its factorization.

689337965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137867598.

The product of its digits is 7348320, while the sum is 56.

The square root of 689337965 is about 26255.2464280951. The cubic root of 689337965 is about 883.3728878297.

The spelling of 689337965 in words is "six hundred eighty-nine million, three hundred thirty-seven thousand, nine hundred sixty-five".