689149 has 12 divisors (see below), whose sum is σ = 768096. Its totient is φ = 616968.

The previous prime is 689141. The next prime is 689167. The reversal of 689149 is 941986.

It is not a de Polignac number, because 689149 - 2³ = 689141 is a prime.

It is a Duffinian number.

Its product of digits (15552) is a multiple of the sum of its prime factors (144).

689149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689141) 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, 8262 + ... + 8344.

It is an arithmetic number, because the mean of its divisors is an integer number (64008).

2⁶⁸⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

689149 is a deficient number, since it is larger than the sum of its proper divisors (78947).

689149 is a wasteful number, since it uses less digits than its factorization.

689149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 125 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 689149 is about 830.1499864482. The cubic root of 689149 is about 88.3292162157.

It can be divided in two parts, 689 and 149, that added together give a palindrome (838).

The spelling of 689149 in words is "six hundred eighty-nine thousand, one hundred forty-nine".