680399747 has 4 divisors (see below), whose sum is σ = 716210280. Its totient is φ = 644589216.

The previous prime is 680399717. The next prime is 680399767. The reversal of 680399747 is 747993086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747993086 = 2 ⋅373996543.

It is a cyclic number.

It is not a de Polignac number, because 680399747 - 2¹⁶ = 680334211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680399717) 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, 17905238 + ... + 17905275.

It is an arithmetic number, because the mean of its divisors is an integer number (179052570).

Almost surely, 2^680399747 is an apocalyptic number.

680399747 is a deficient number, since it is larger than the sum of its proper divisors (35810533).

680399747 is a wasteful number, since it uses less digits than its factorization.

680399747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35810532.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 680399747 is about 26084.4732935131. The cubic root of 680399747 is about 879.5382163111.

The spelling of 680399747 in words is "six hundred eighty million, three hundred ninety-nine thousand, seven hundred forty-seven".