689329 has 4 divisors (see below), whose sum is σ = 693360. Its totient is φ = 685300.

The previous prime is 689321. The next prime is 689341. The reversal of 689329 is 923986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 689329 - 2³ = 689321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (173340).

2⁶⁸⁹³²⁹ is an apocalyptic number.

It is an amenable number.

689329 is a deficient number, since it is larger than the sum of its proper divisors (4031).

689329 is a wasteful number, since it uses less digits than its factorization.

689329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030.

The product of its digits is 23328, while the sum is 37.

The square root of 689329 is about 830.2583935137. The cubic root of 689329 is about 88.3369058323.

The spelling of 689329 in words is "six hundred eighty-nine thousand, three hundred twenty-nine".