4002239 has 2 divisors, whose sum is σ = 4002240. Its totient is φ = 4002238.

The previous prime is 4002223. The next prime is 4002247. The reversal of 4002239 is 9322004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4002239 - 2⁴ = 4002223 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4002239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001119 + 2001120.

It is an arithmetic number, because the mean of its divisors is an integer number (2001120).

Almost surely, 2^4002239 is an apocalyptic number.

4002239 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002239 is an equidigital number, since it uses as much as digits as its factorization.

4002239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 4002239 is about 2000.5596716919. The cubic root of 4002239 is about 158.7697179302.

The spelling of 4002239 in words is "four million, two thousand, two hundred thirty-nine".