680396647 has 4 divisors (see below), whose sum is σ = 777596176. Its totient is φ = 583197120.

The previous prime is 680396641. The next prime is 680396657. The reversal of 680396647 is 746693086.

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

It is a cyclic number.

It is not a de Polignac number, because 680396647 - 2¹¹ = 680394599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 680396647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680396641) 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, 48599754 + ... + 48599767.

It is an arithmetic number, because the mean of its divisors is an integer number (194399044).

Almost surely, 2^680396647 is an apocalyptic number.

680396647 is a deficient number, since it is larger than the sum of its proper divisors (97199529).

680396647 is an equidigital number, since it uses as much as digits as its factorization.

680396647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97199528.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 680396647 is about 26084.4138711223. The cubic root of 680396647 is about 879.5368805411.

The spelling of 680396647 in words is "six hundred eighty million, three hundred ninety-six thousand, six hundred forty-seven".