643050887683 has 2 divisors, whose sum is σ = 643050887684. Its totient is φ = 643050887682.

The previous prime is 643050887657. The next prime is 643050887693. The reversal of 643050887683 is 386788050346.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643050887683 is a prime.

It is a super-2 number, since 2×643050887683² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (643050887623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321525443841 + 321525443842.

It is an arithmetic number, because the mean of its divisors is an integer number (321525443842).

Almost surely, 2^643050887683 is an apocalyptic number.

643050887683 is a deficient number, since it is larger than the sum of its proper divisors (1).

643050887683 is an equidigital number, since it uses as much as digits as its factorization.

643050887683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 643050887683 in words is "six hundred forty-three billion, fifty million, eight hundred eighty-seven thousand, six hundred eighty-three".