4399139 has 4 divisors (see below), whose sum is σ = 4420200. Its totient is φ = 4378080.

The previous prime is 4399133. The next prime is 4399147. The reversal of 4399139 is 9319934.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4399139 - 2⁴ = 4399123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4399133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10214 + ... + 10635.

It is an arithmetic number, because the mean of its divisors is an integer number (1105050).

Almost surely, 2^4399139 is an apocalyptic number.

4399139 is a deficient number, since it is larger than the sum of its proper divisors (21061).

4399139 is a wasteful number, since it uses less digits than its factorization.

4399139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21060.

The product of its digits is 26244, while the sum is 38.

The square root of 4399139 is about 2097.4124534769. The cubic root of 4399139 is about 163.8535650045.

The spelling of 4399139 in words is "four million, three hundred ninety-nine thousand, one hundred thirty-nine".