680249121 has 16 divisors (see below), whose sum is σ = 931491264. Its totient is φ = 441330624.

The previous prime is 680249099. The next prime is 680249131. The reversal of 680249121 is 121942086.

It is not a de Polignac number, because 680249121 - 2⁹ = 680248609 is a prime.

It is a super-3 number, since 3×680249121³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (680249131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 26215 + ... + 45251.

It is an arithmetic number, because the mean of its divisors is an integer number (58218204).

Almost surely, 2^680249121 is an apocalyptic number.

It is an amenable number.

680249121 is a deficient number, since it is larger than the sum of its proper divisors (251242143).

680249121 is a wasteful number, since it uses less digits than its factorization.

680249121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19360.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 680249121 is about 26081.5858605262. The cubic root of 680249121 is about 879.4733078503.

The spelling of 680249121 in words is "six hundred eighty million, two hundred forty-nine thousand, one hundred twenty-one".