1040321209 has 2 divisors, whose sum is σ = 1040321210. Its totient is φ = 1040321208.

The previous prime is 1040321207. The next prime is 1040321213. The reversal of 1040321209 is 9021230401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737665600 + 302655609 = 27160^2 + 17397^2 .

It is an emirp because it is prime and its reverse (9021230401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1040321209 - 2¹ = 1040321207 is a prime.

Together with 1040321207, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1040321209.

It is not a weakly prime, because it can be changed into another prime (1040321201) 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, 520160604 + 520160605.

It is an arithmetic number, because the mean of its divisors is an integer number (520160605).

Almost surely, 2^1040321209 is an apocalyptic number.

It is an amenable number.

1040321209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040321209 is an equidigital number, since it uses as much as digits as its factorization.

1040321209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1040321209 is about 32254.0107428518. The cubic root of 1040321209 is about 1013.2636994678.

The spelling of 1040321209 in words is "one billion, forty million, three hundred twenty-one thousand, two hundred nine".