689652 has 18 divisors (see below), whose sum is σ = 1743378. Its totient is φ = 229872.

The previous prime is 689641. The next prime is 689693. The reversal of 689652 is 256986.

689652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 404496 + 285156 = 636^2 + 534^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×689652² = 951239762208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 19157 = 689652 / (6 + 8 + 9 + 6 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

689652 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9543 + ... + 9614.

2⁶⁸⁹⁶⁵² is an apocalyptic number.

It is an amenable number.

689652 is an abundant number, since it is smaller than the sum of its proper divisors (1053726).

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

689652 is a wasteful number, since it uses less digits than its factorization.

689652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19167 (or 19162 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 689652 is about 830.4528884892. The cubic root of 689652 is about 88.3507010666.

The spelling of 689652 in words is "six hundred eighty-nine thousand, six hundred fifty-two".