1006943221 has 2 divisors, whose sum is σ = 1006943222. Its totient is φ = 1006943220.

The previous prime is 1006943183. The next prime is 1006943233. The reversal of 1006943221 is 1223496001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 784784196 + 222159025 = 28014^2 + 14905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006943221 - 2⁹ = 1006942709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1006943221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1006943251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503471610 + 503471611.

It is an arithmetic number, because the mean of its divisors is an integer number (503471611).

Almost surely, 2^1006943221 is an apocalyptic number.

It is an amenable number.

1006943221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006943221 is an equidigital number, since it uses as much as digits as its factorization.

1006943221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1006943221 is about 31732.3686635587. The cubic root of 1006943221 is about 1002.3090710869.

The spelling of 1006943221 in words is "one billion, six million, nine hundred forty-three thousand, two hundred twenty-one".