689579 has 12 divisors (see below), whose sum is σ = 782040. Its totient is φ = 607200.

The previous prime is 689561. The next prime is 689581. The reversal of 689579 is 975986.

689579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-689579 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (689509) 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, 4892 + ... + 5030.

It is an arithmetic number, because the mean of its divisors is an integer number (65170).

2⁶⁸⁹⁵⁷⁹ is an apocalyptic number.

689579 is a deficient number, since it is larger than the sum of its proper divisors (92461).

689579 is a wasteful number, since it uses less digits than its factorization.

689579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 191 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 689579 is about 830.4089354047. The cubic root of 689579 is about 88.3475836351.

The spelling of 689579 in words is "six hundred eighty-nine thousand, five hundred seventy-nine".