1020038209 has 2 divisors, whose sum is σ = 1020038210. Its totient is φ = 1020038208.

The previous prime is 1020038203. The next prime is 1020038213. The reversal of 1020038209 is 9028300201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1001089600 + 18948609 = 31640^2 + 4353^2 .

It is an emirp because it is prime and its reverse (9028300201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020038209 - 2⁵ = 1020038177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020038203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510019104 + 510019105.

It is an arithmetic number, because the mean of its divisors is an integer number (510019105).

Almost surely, 2^1020038209 is an apocalyptic number.

It is an amenable number.

1020038209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020038209 is an equidigital number, since it uses as much as digits as its factorization.

1020038209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1020038209 is about 31938.0370248392. The cubic root of 1020038209 is about 1006.6352786996.

The spelling of 1020038209 in words is "one billion, twenty million, thirty-eight thousand, two hundred nine".