680107121 has 4 divisors (see below), whose sum is σ = 680162532. Its totient is φ = 680051712.

The previous prime is 680107091. The next prime is 680107157. The reversal of 680107121 is 121701086.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 308388721 + 371718400 = 17561^2 + 19280^2 .

It is a cyclic number.

It is not a de Polignac number, because 680107121 - 2¹⁴ = 680090737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680107621) 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 3 ways as a sum of consecutive naturals, for example, 176 + ... + 36881.

It is an arithmetic number, because the mean of its divisors is an integer number (170040633).

Almost surely, 2^680107121 is an apocalyptic number.

It is an amenable number.

680107121 is a deficient number, since it is larger than the sum of its proper divisors (55411).

680107121 is a wasteful number, since it uses less digits than its factorization.

680107121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55410.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 680107121 is about 26078.8634913410. The cubic root of 680107121 is about 879.4121077710.

The spelling of 680107121 in words is "six hundred eighty million, one hundred seven thousand, one hundred twenty-one".