688751325 has 18 divisors (see below), whose sum is σ = 1233630554. Its totient is φ = 367333920.

The previous prime is 688751299. The next prime is 688751351. The reversal of 688751325 is 523157886.

It is an interprime number because it is at equal distance from previous prime (688751299) and next prime (688751351).

It can be written as a sum of positive squares in 3 ways, for example, as 230705721 + 458045604 = 15189^2 + 21402^2 .

It is not a de Polignac number, because 688751325 - 2⁸ = 688751069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1530334 + ... + 1530783.

Almost surely, 2^688751325 is an apocalyptic number.

It is an amenable number.

688751325 is a deficient number, since it is larger than the sum of its proper divisors (544879229).

688751325 is a wasteful number, since it uses less digits than its factorization.

688751325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061133 (or 3061125 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 688751325 is about 26244.0721878294. The cubic root of 688751325 is about 883.1222275477.

The spelling of 688751325 in words is "six hundred eighty-eight million, seven hundred fifty-one thousand, three hundred twenty-five".