689129 has 8 divisors (see below), whose sum is σ = 834048. Its totient is φ = 555840.

The previous prime is 689113. The next prime is 689131. The reversal of 689129 is 921986.

689129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689129 - 2⁴ = 689113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2777 + ... + 3014.

It is an arithmetic number, because the mean of its divisors is an integer number (104256).

2⁶⁸⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

689129 is a deficient number, since it is larger than the sum of its proper divisors (144919).

689129 is a wasteful number, since it uses less digits than its factorization.

689129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815.

The product of its digits is 7776, while the sum is 35.

The square root of 689129 is about 830.1379403449. The cubic root of 689129 is about 88.3283617312.

It can be divided in two parts, 68912 and 9, that added together give a cube (68921 = 41³).

The spelling of 689129 in words is "six hundred eighty-nine thousand, one hundred twenty-nine".