689525 has 6 divisors (see below), whose sum is σ = 855042. Its totient is φ = 551600.

The previous prime is 689509. The next prime is 689551. The reversal of 689525 is 525986.

689525 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 3 ways, for example, as 228484 + 461041 = 478^2 + 679^2 .

It is not a de Polignac number, because 689525 - 2⁴ = 689509 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 13766 + ... + 13815.

It is an arithmetic number, because the mean of its divisors is an integer number (142507).

2⁶⁸⁹⁵²⁵ is an apocalyptic number.

It is an amenable number.

689525 is a deficient number, since it is larger than the sum of its proper divisors (165517).

689525 is a wasteful number, since it uses less digits than its factorization.

689525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27591 (or 27586 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 689525 is about 830.3764206672. The cubic root of 689525 is about 88.3452774482.

The spelling of 689525 in words is "six hundred eighty-nine thousand, five hundred twenty-five".