680781367 has 4 divisors (see below), whose sum is σ = 778035856. Its totient is φ = 583526880.

The previous prime is 680781349. The next prime is 680781373. The reversal of 680781367 is 763187086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680781367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680781307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48627234 + ... + 48627247.

It is an arithmetic number, because the mean of its divisors is an integer number (194508964).

Almost surely, 2^680781367 is an apocalyptic number.

680781367 is a deficient number, since it is larger than the sum of its proper divisors (97254489).

680781367 is an equidigital number, since it uses as much as digits as its factorization.

680781367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97254488.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 680781367 is about 26091.7873477460. The cubic root of 680781367 is about 879.7026229179.

The spelling of 680781367 in words is "six hundred eighty million, seven hundred eighty-one thousand, three hundred sixty-seven".