689530 has 16 divisors (see below), whose sum is σ = 1265544. Its totient is φ = 270400.

The previous prime is 689509. The next prime is 689551. The reversal of 689530 is 35986.

689530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (689509) and next prime (689551).

It can be written as a sum of positive squares in 4 ways, for example, as 388129 + 301401 = 623^2 + 549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 689492 and 689501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 1180.

2⁶⁸⁹⁵³⁰ is an apocalyptic number.

689530 is a deficient number, since it is larger than the sum of its proper divisors (576014).

689530 is a wasteful number, since it uses less digits than its factorization.

689530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 689530 is about 830.3794313445. The cubic root of 689530 is about 88.3454909891.

The spelling of 689530 in words is "six hundred eighty-nine thousand, five hundred thirty".