1020985193 has 2 divisors, whose sum is σ = 1020985194. Its totient is φ = 1020985192.

The previous prime is 1020985187. The next prime is 1020985211. The reversal of 1020985193 is 3915890201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549574249 + 471410944 = 23443^2 + 21712^2 .

It is an emirp because it is prime and its reverse (3915890201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020985193 - 2¹⁰ = 1020984169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1020985123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510492596 + 510492597.

It is an arithmetic number, because the mean of its divisors is an integer number (510492597).

Almost surely, 2^1020985193 is an apocalyptic number.

It is an amenable number.

1020985193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020985193 is an equidigital number, since it uses as much as digits as its factorization.

1020985193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1020985193 is about 31952.8589174740. The cubic root of 1020985193 is about 1006.9466960066.

The spelling of 1020985193 in words is "one billion, twenty million, nine hundred eighty-five thousand, one hundred ninety-three".