4398239 has 2 divisors, whose sum is σ = 4398240. Its totient is φ = 4398238.

The previous prime is 4398217. The next prime is 4398241. The reversal of 4398239 is 9328934.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4398239 - 2⁸ = 4397983 is a prime.

It is a super-2 number, since 2×4398239² = 38689012602242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 4398241, 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 (4398839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2199119 + 2199120.

It is an arithmetic number, because the mean of its divisors is an integer number (2199120).

Almost surely, 2^4398239 is an apocalyptic number.

4398239 is a deficient number, since it is larger than the sum of its proper divisors (1).

4398239 is an equidigital number, since it uses as much as digits as its factorization.

4398239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 4398239 is about 2097.1978924269. The cubic root of 4398239 is about 163.8423902219.

The spelling of 4398239 in words is "four million, three hundred ninety-eight thousand, two hundred thirty-nine".