689139 has 12 divisors (see below), whose sum is σ = 1086072. Its totient is φ = 417600.

The previous prime is 689131. The next prime is 689141. The reversal of 689139 is 931986.

689139 = T₁₃₂ + T₁₃₃ + ... + T₁₈₅.

It is not a de Polignac number, because 689139 - 2³ = 689131 is a prime.

It is a super-2 number, since 2×689139² = 949825122642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3382 + ... + 3579.

It is an arithmetic number, because the mean of its divisors is an integer number (90506).

2⁶⁸⁹¹³⁹ is an apocalyptic number.

689139 is a deficient number, since it is larger than the sum of its proper divisors (396933).

689139 is a wasteful number, since it uses less digits than its factorization.

689139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978 (or 6975 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 689139 is about 830.1439634184. The cubic root of 689139 is about 88.3287889755.

It can be divided in two parts, 689 and 139, that added together give a palindrome (828).

The spelling of 689139 in words is "six hundred eighty-nine thousand, one hundred thirty-nine".