689529425 has 24 divisors (see below), whose sum is σ = 922633656. Its totient is φ = 508170240.

The previous prime is 689529413. The next prime is 689529427. The reversal of 689529425 is 524925986.

It can be written as a sum of positive squares in 12 ways, for example, as 32581264 + 656948161 = 5708^2 + 25631^2 .

It is not a de Polignac number, because 689529425 - 2¹⁰ = 689528401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689529427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185687 + ... + 189363.

It is an arithmetic number, because the mean of its divisors is an integer number (38443069).

Almost surely, 2^689529425 is an apocalyptic number.

689529425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

689529425 is a deficient number, since it is larger than the sum of its proper divisors (233104231).

689529425 is a wasteful number, since it uses less digits than its factorization.

689529425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277 (or 4272 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 50.

The square root of 689529425 is about 26258.8923033703. The cubic root of 689529425 is about 883.4546643194.

The spelling of 689529425 in words is "six hundred eighty-nine million, five hundred twenty-nine thousand, four hundred twenty-five".