689539125 has 64 divisors (see below), whose sum is σ = 1325465856. Its totient is φ = 314624000.

The previous prime is 689539121. The next prime is 689539129. The reversal of 689539125 is 521935986.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (689539121) and next prime (689539129).

It is not a de Polignac number, because 689539125 - 2² = 689539121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689539121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65209 + ... + 75041.

It is an arithmetic number, because the mean of its divisors is an integer number (20710404).

Almost surely, 2^689539125 is an apocalyptic number.

It is an amenable number.

689539125 is a deficient number, since it is larger than the sum of its proper divisors (635926731).

689539125 is a wasteful number, since it uses less digits than its factorization.

689539125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879 (or 9869 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The square root of 689539125 is about 26259.0770020578. The cubic root of 689539125 is about 883.4588069853.

The spelling of 689539125 in words is "six hundred eighty-nine million, five hundred thirty-nine thousand, one hundred twenty-five".