689704 has 16 divisors (see below), whose sum is σ = 1312020. Its totient is φ = 339840.

The previous prime is 689699. The next prime is 689713. The reversal of 689704 is 407986.

It can be written as a sum of positive squares in 2 ways, for example, as 636804 + 52900 = 798^2 + 230^2 .

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 689704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7 + ... + 1174.

2⁶⁸⁹⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

689704 is a deficient number, since it is larger than the sum of its proper divisors (622316).

689704 is a wasteful number, since it uses less digits than its factorization.

689704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 689704 is about 830.4841961169. The cubic root of 689704 is about 88.3529215687.

The spelling of 689704 in words is "six hundred eighty-nine thousand, seven hundred four".