680172943 has 2 divisors, whose sum is σ = 680172944. Its totient is φ = 680172942.

The previous prime is 680172937. The next prime is 680172947. The reversal of 680172943 is 349271086.

680172943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680172943 - 2²⁹ = 143302031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680172896 and 680172905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680172947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340086471 + 340086472.

It is an arithmetic number, because the mean of its divisors is an integer number (340086472).

Almost surely, 2^680172943 is an apocalyptic number.

680172943 is a deficient number, since it is larger than the sum of its proper divisors (1).

680172943 is an equidigital number, since it uses as much as digits as its factorization.

680172943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 680172943 is about 26080.1254406492. The cubic root of 680172943 is about 879.4404772218.

The spelling of 680172943 in words is "six hundred eighty million, one hundred seventy-two thousand, nine hundred forty-three".