689994 has 12 divisors (see below), whose sum is σ = 1495026. Its totient is φ = 229992.

The previous prime is 689987. The next prime is 690037. The reversal of 689994 is 499986.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 149769 = 735^2 + 387^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689994.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19149 + ... + 19184.

2⁶⁸⁹⁹⁹⁴ is an apocalyptic number.

689994 is an abundant number, since it is smaller than the sum of its proper divisors (805032).

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

689994 is a wasteful number, since it uses less digits than its factorization.

689994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38341 (or 38338 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 689994 is about 830.6587747084. The cubic root of 689994 is about 88.3653030912.

It can be divided in two parts, 6 and 89994, that added together give a square (90000 = 300²).

The spelling of 689994 in words is "six hundred eighty-nine thousand, nine hundred ninety-four".