680386243 has 2 divisors, whose sum is σ = 680386244. Its totient is φ = 680386242.

The previous prime is 680386193. The next prime is 680386271. The reversal of 680386243 is 342683086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680386243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680386196 and 680386205.

It is not a weakly prime, because it can be changed into another prime (680486243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340193121 + 340193122.

It is an arithmetic number, because the mean of its divisors is an integer number (340193122).

Almost surely, 2^680386243 is an apocalyptic number.

680386243 is a deficient number, since it is larger than the sum of its proper divisors (1).

680386243 is an equidigital number, since it uses as much as digits as its factorization.

680386243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 680386243 is about 26084.2144409219. The cubic root of 680386243 is about 879.5323974951.

The spelling of 680386243 in words is "six hundred eighty million, three hundred eighty-six thousand, two hundred forty-three".