9420239 has 2 divisors, whose sum is σ = 9420240. Its totient is φ = 9420238.

The previous prime is 9420223. The next prime is 9420241. The reversal of 9420239 is 9320249.

It is a strong prime.

It is an emirp because it is prime and its reverse (9320249) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9420239 - 2⁴ = 9420223 is a prime.

Together with 9420241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9420269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4710119 + 4710120.

It is an arithmetic number, because the mean of its divisors is an integer number (4710120).

Almost surely, 2^9420239 is an apocalyptic number.

9420239 is a deficient number, since it is larger than the sum of its proper divisors (1).

9420239 is an equidigital number, since it uses as much as digits as its factorization.

9420239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 9420239 is about 3069.2407856015. The cubic root of 9420239 is about 211.1967871293.

The spelling of 9420239 in words is "nine million, four hundred twenty thousand, two hundred thirty-nine".