643068323 has 2 divisors, whose sum is σ = 643068324. Its totient is φ = 643068322.

The previous prime is 643068289. The next prime is 643068329. The reversal of 643068323 is 323860346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643068323 - 2⁶ = 643068259 is a prime.

It is not a weakly prime, because it can be changed into another prime (643068329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321534161 + 321534162.

It is an arithmetic number, because the mean of its divisors is an integer number (321534162).

Almost surely, 2^643068323 is an apocalyptic number.

643068323 is a deficient number, since it is larger than the sum of its proper divisors (1).

643068323 is an equidigital number, since it uses as much as digits as its factorization.

643068323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 643068323 is about 25358.7918284764. The cubic root of 643068323 is about 863.1488688079.

The spelling of 643068323 in words is "six hundred forty-three million, sixty-eight thousand, three hundred twenty-three".