302440009 has 2 divisors, whose sum is σ = 302440010. Its totient is φ = 302440008.

The previous prime is 302440007. The next prime is 302440031. The reversal of 302440009 is 900044203.

It is an a-pointer prime, because the next prime (302440031) can be obtained adding 302440009 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269124025 + 33315984 = 16405^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 302440009 - 2¹ = 302440007 is a prime.

It is a super-5 number, since 5×302440009⁵ (a number of 44 digits) contains 55555 as substring.

Together with 302440007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (302440007) 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, 151220004 + 151220005.

It is an arithmetic number, because the mean of its divisors is an integer number (151220005).

Almost surely, 2^302440009 is an apocalyptic number.

It is an amenable number.

302440009 is a deficient number, since it is larger than the sum of its proper divisors (1).

302440009 is an equidigital number, since it uses as much as digits as its factorization.

302440009 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 22.

The square root of 302440009 is about 17390.8024254202. The cubic root of 302440009 is about 671.2429655479.

The spelling of 302440009 in words is "three hundred two million, four hundred forty thousand, nine".