689812 has 12 divisors (see below), whose sum is σ = 1246336. Its totient is φ = 333720.

The previous prime is 689807. The next prime is 689827. The reversal of 689812 is 218986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2658 + ... + 2905.

2⁶⁸⁹⁸¹² is an apocalyptic number.

689812 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

689812 is a deficient number, since it is larger than the sum of its proper divisors (556524).

689812 is a wasteful number, since it uses less digits than its factorization.

689812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5598 (or 5596 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 689812 is about 830.5492158807. The cubic root of 689812 is about 88.3575330240.

The spelling of 689812 in words is "six hundred eighty-nine thousand, eight hundred twelve".