689312 has 24 divisors (see below), whose sum is σ = 1462356. Its totient is φ = 317952.

The previous prime is 689309. The next prime is 689317. The reversal of 689312 is 213986.

It can be written as a sum of positive squares in 2 ways, for example, as 633616 + 55696 = 796^2 + 236^2 .

It is not an unprimeable number, because it can be changed into a prime (689317) 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, 413 + ... + 1244.

2⁶⁸⁹³¹² is an apocalyptic number.

It is an amenable number.

689312 is an abundant number, since it is smaller than the sum of its proper divisors (773044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689312 is a wasteful number, since it uses less digits than its factorization.

689312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1672 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 689312 is about 830.2481556740. The cubic root of 689312 is about 88.3361796480.

It can be divided in two parts, 689 and 312, that added together give a palindrome (1001).

The spelling of 689312 in words is "six hundred eighty-nine thousand, three hundred twelve".