689457025 has 12 divisors (see below), whose sum is σ = 875779884. Its totient is φ = 538112000.

The previous prime is 689457023. The next prime is 689457031. The reversal of 689457025 is 520754986.

It can be written as a sum of positive squares in 6 ways, for example, as 237129201 + 452327824 = 15399^2 + 21268^2 .

It is not a de Polignac number, because 689457025 - 2¹ = 689457023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689457023) 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, 335296 + ... + 337345.

It is an arithmetic number, because the mean of its divisors is an integer number (72981657).

Almost surely, 2^689457025 is an apocalyptic number.

It is an amenable number.

689457025 is a deficient number, since it is larger than the sum of its proper divisors (186322859).

689457025 is a wasteful number, since it uses less digits than its factorization.

689457025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672692 (or 672687 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 689457025 is about 26257.5136865622. The cubic root of 689457025 is about 883.4237425757.

The spelling of 689457025 in words is "six hundred eighty-nine million, four hundred fifty-seven thousand, twenty-five".