643071059 has 2 divisors, whose sum is σ = 643071060. Its totient is φ = 643071058.

The previous prime is 643070999. The next prime is 643071067. The reversal of 643071059 is 950170346.

643071059 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 643071059 - 2²⁸ = 374635603 is a prime.

It is not a weakly prime, because it can be changed into another prime (643071659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321535529 + 321535530.

It is an arithmetic number, because the mean of its divisors is an integer number (321535530).

Almost surely, 2^643071059 is an apocalyptic number.

643071059 is a deficient number, since it is larger than the sum of its proper divisors (1).

643071059 is an equidigital number, since it uses as much as digits as its factorization.

643071059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 643071059 is about 25358.8457742067. The cubic root of 643071059 is about 863.1500929245.

The spelling of 643071059 in words is "six hundred forty-three million, seventy-one thousand, fifty-nine".