302242009 has 4 divisors (see below), whose sum is σ = 305358004. Its totient is φ = 299126016.

The previous prime is 302242001. The next prime is 302242013. The reversal of 302242009 is 900242203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900242203 = 7 ⋅128606029.

It can be written as a sum of positive squares in 2 ways, for example, as 124099600 + 178142409 = 11140^2 + 13347^2 .

It is a cyclic number.

It is not a de Polignac number, because 302242009 - 2³ = 302242001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (302242001) 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 in 3 ways as a sum of consecutive naturals, for example, 1557852 + ... + 1558045.

It is an arithmetic number, because the mean of its divisors is an integer number (76339501).

Almost surely, 2^302242009 is an apocalyptic number.

It is an amenable number.

302242009 is a deficient number, since it is larger than the sum of its proper divisors (3115995).

302242009 is an equidigital number, since it uses as much as digits as its factorization.

302242009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115994.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 302242009 is about 17385.1088291100. The cubic root of 302242009 is about 671.0964515096.

The spelling of 302242009 in words is "three hundred two million, two hundred forty-two thousand, nine".