689800139 has 16 divisors (see below), whose sum is σ = 822941376. Its totient is φ = 565833600.

The previous prime is 689800117. The next prime is 689800147. The reversal of 689800139 is 931008986.

689800139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689800139 - 2²⁰ = 688751563 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689800139.

It is not an unprimeable number, because it can be changed into a prime (689800159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6032 + ... + 37629.

It is an arithmetic number, because the mean of its divisors is an integer number (51433836).

Almost surely, 2^689800139 is an apocalyptic number.

689800139 is a deficient number, since it is larger than the sum of its proper divisors (133141237).

689800139 is a wasteful number, since it uses less digits than its factorization.

689800139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43766.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 689800139 is about 26264.0465084876. The cubic root of 689800139 is about 883.5702659868.

The spelling of 689800139 in words is "six hundred eighty-nine million, eight hundred thousand, one hundred thirty-nine".