688201925 has 12 divisors (see below), whose sum is σ = 855024516. Its totient is φ = 549494400.

The previous prime is 688201919. The next prime is 688201931. The reversal of 688201925 is 529102886.

It is an interprime number because it is at equal distance from previous prime (688201919) and next prime (688201931).

It can be written as a sum of positive squares in 6 ways, for example, as 234426721 + 453775204 = 15311^2 + 21302^2 .

It is not a de Polignac number, because 688201925 - 2¹⁴ = 688185541 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 13394 + ... + 39443.

It is an arithmetic number, because the mean of its divisors is an integer number (71252043).

Almost surely, 2^688201925 is an apocalyptic number.

It is an amenable number.

688201925 is a deficient number, since it is larger than the sum of its proper divisors (166822591).

688201925 is a wasteful number, since it uses less digits than its factorization.

688201925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53368 (or 53363 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 688201925 is about 26233.6029740484. The cubic root of 688201925 is about 882.8873501211.

The spelling of 688201925 in words is "six hundred eighty-eight million, two hundred one thousand, nine hundred twenty-five".