680784981 has 8 divisors (see below), whose sum is σ = 947179200. Its totient is φ = 434123712.

The previous prime is 680784967. The next prime is 680784997. The reversal of 680784981 is 189487086.

680784981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 680784981 - 2⁹ = 680784469 is a prime.

It is a super-2 number, since 2×680784981² = 926936380710340722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680784961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4933156 + ... + 4933293.

It is an arithmetic number, because the mean of its divisors is an integer number (118397400).

Almost surely, 2^680784981 is an apocalyptic number.

It is an amenable number.

680784981 is a deficient number, since it is larger than the sum of its proper divisors (266394219).

680784981 is a wasteful number, since it uses less digits than its factorization.

680784981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9866475.

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 680784981 is about 26091.8566031626. The cubic root of 680784981 is about 879.7041795800.

The spelling of 680784981 in words is "six hundred eighty million, seven hundred eighty-four thousand, nine hundred eighty-one".