1009142209 has 2 divisors, whose sum is σ = 1009142210. Its totient is φ = 1009142208.

The previous prime is 1009142201. The next prime is 1009142213. The reversal of 1009142209 is 9022419001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609941809 + 399200400 = 24697^2 + 19980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009142209 - 2³ = 1009142201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1009142201) 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, 504571104 + 504571105.

It is an arithmetic number, because the mean of its divisors is an integer number (504571105).

Almost surely, 2^1009142209 is an apocalyptic number.

It is an amenable number.

1009142209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009142209 is an equidigital number, since it uses as much as digits as its factorization.

1009142209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1009142209 is about 31766.9987408317. The cubic root of 1009142209 is about 1003.0381632164.

The spelling of 1009142209 in words is "one billion, nine million, one hundred forty-two thousand, two hundred nine".