690375625 has 15 divisors (see below), whose sum is σ = 863514993. Its totient is φ = 551775000.

The previous prime is 690375619. The next prime is 690375677. The reversal of 690375625 is 526573096.

The square root of 690375625 is 26275.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 54125449 + 636250176 = 7357^2 + 25224^2 .

It is not a de Polignac number, because 690375625 - 2³ = 690375617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 656350 + ... + 657400.

Almost surely, 2^690375625 is an apocalyptic number.

690375625 is the 26275-th square number.

690375625 is the 13138-th centered octagonal number.

It is an amenable number.

690375625 is a deficient number, since it is larger than the sum of its proper divisors (173139368).

690375625 is an frugal number, since it uses more digits than its factorization.

690375625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 43.

The cubic root of 690375625 is about 883.8159124910.

It can be divided in two parts, 6903 and 75625, that added together give a palindrome (82528).

The spelling of 690375625 in words is "six hundred ninety million, three hundred seventy-five thousand, six hundred twenty-five".