689438125 has 10 divisors (see below), whose sum is σ = 861522662. Its totient is φ = 551550000.

The previous prime is 689438119. The next prime is 689438137. The reversal of 689438125 is 521834986.

It can be written as a sum of positive squares in 5 ways, for example, as 304258249 + 385179876 = 17443^2 + 19626^2 .

It is not a de Polignac number, because 689438125 - 2³ = 689438117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 550926 + ... + 552175.

Almost surely, 2^689438125 is an apocalyptic number.

It is an amenable number.

689438125 is a deficient number, since it is larger than the sum of its proper divisors (172084537).

689438125 is an equidigital number, since it uses as much as digits as its factorization.

689438125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103121 (or 1103106 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 689438125 is about 26257.1537871110. The cubic root of 689438125 is about 883.4156701068.

The spelling of 689438125 in words is "six hundred eighty-nine million, four hundred thirty-eight thousand, one hundred twenty-five".