680997493 has 16 divisors (see below), whose sum is σ = 762448896. Its totient is φ = 602889840.

The previous prime is 680997463. The next prime is 680997539. The reversal of 680997493 is 394799086.

680997493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680997493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680997403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171630 + ... + 175552.

It is an arithmetic number, because the mean of its divisors is an integer number (47653056).

Almost surely, 2^680997493 is an apocalyptic number.

It is an amenable number.

680997493 is a deficient number, since it is larger than the sum of its proper divisors (81451403).

680997493 is a wasteful number, since it uses less digits than its factorization.

680997493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 680997493 is about 26095.9286671312. The cubic root of 680997493 is about 879.7957054170.

The spelling of 680997493 in words is "six hundred eighty million, nine hundred ninety-seven thousand, four hundred ninety-three".