4399939 has 2 divisors, whose sum is σ = 4399940. Its totient is φ = 4399938.

The previous prime is 4399933. The next prime is 4399943. The reversal of 4399939 is 9399934.

4399939 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4399939 - 2³ = 4399931 is a prime.

It is not a weakly prime, because it can be changed into another prime (4399931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2199969 + 2199970.

It is an arithmetic number, because the mean of its divisors is an integer number (2199970).

Almost surely, 2^4399939 is an apocalyptic number.

4399939 is a deficient number, since it is larger than the sum of its proper divisors (1).

4399939 is an equidigital number, since it uses as much as digits as its factorization.

4399939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 46.

The square root of 4399939 is about 2097.6031559854. The cubic root of 4399939 is about 163.8634968652.

The spelling of 4399939 in words is "four million, three hundred ninety-nine thousand, nine hundred thirty-nine".