689825 has 12 divisors (see below), whose sum is σ = 877548. Its totient is φ = 537600.

The previous prime is 689807. The next prime is 689827. The reversal of 689825 is 528986.

It can be written as a sum of positive squares in 6 ways, for example, as 165649 + 524176 = 407^2 + 724^2 .

It is not a de Polignac number, because 689825 - 2⁶ = 689761 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689825.

It is not an unprimeable number, because it can be changed into a prime (689827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689 + ... + 1361.

It is an arithmetic number, because the mean of its divisors is an integer number (73129).

2⁶⁸⁹⁸²⁵ is an apocalyptic number.

It is an amenable number.

689825 is a deficient number, since it is larger than the sum of its proper divisors (187723).

689825 is a wasteful number, since it uses less digits than its factorization.

689825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 719 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 689825 is about 830.5570419905. The cubic root of 689825 is about 88.3580880741.

The spelling of 689825 in words is "six hundred eighty-nine thousand, eight hundred twenty-five".