680242647 has 24 divisors (see below), whose sum is σ = 1091458800. Its totient is φ = 375303936.

The previous prime is 680242643. The next prime is 680242657. The reversal of 680242647 is 746242086.

It is not a de Polignac number, because 680242647 - 2² = 680242643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680242643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75522 + ... + 84047.

It is an arithmetic number, because the mean of its divisors is an integer number (45477450).

Almost surely, 2^680242647 is an apocalyptic number.

680242647 is a deficient number, since it is larger than the sum of its proper divisors (411216153).

680242647 is a wasteful number, since it uses less digits than its factorization.

680242647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159615 (or 159608 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 680242647 is about 26081.4617496796. The cubic root of 680242647 is about 879.4705178292.

The spelling of 680242647 in words is "six hundred eighty million, two hundred forty-two thousand, six hundred forty-seven".