680001643 has 8 divisors (see below), whose sum is σ = 689877728. Its totient is φ = 670140864.

The previous prime is 680001617. The next prime is 680001667. The reversal of 680001643 is 346100086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 680001643 - 2⁵ = 680001611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680001043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109621 + ... + 115657.

It is an arithmetic number, because the mean of its divisors is an integer number (86234716).

Almost surely, 2^680001643 is an apocalyptic number.

680001643 is a deficient number, since it is larger than the sum of its proper divisors (9876085).

680001643 is a wasteful number, since it uses less digits than its factorization.

680001643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7653.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 680001643 is about 26076.8411238785. The cubic root of 680001643 is about 879.3666426655.

The spelling of 680001643 in words is "six hundred eighty million, one thousand, six hundred forty-three".