680971525 has 24 divisors (see below), whose sum is σ = 918776264. Its totient is φ = 497664000.

The previous prime is 680971493. The next prime is 680971531. The reversal of 680971525 is 525179086.

It can be written as a sum of positive squares in 12 ways, for example, as 172108161 + 508863364 = 13119^2 + 22558^2 .

It is not a de Polignac number, because 680971525 - 2⁵ = 680971493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20725 + ... + 42325.

Almost surely, 2^680971525 is an apocalyptic number.

680971525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

680971525 is a deficient number, since it is larger than the sum of its proper divisors (237804739).

680971525 is a wasteful number, since it uses less digits than its factorization.

680971525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21721 (or 21716 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 680971525 is about 26095.4311135110. The cubic root of 680971525 is about 879.7845223972.

The spelling of 680971525 in words is "six hundred eighty million, nine hundred seventy-one thousand, five hundred twenty-five".