4399243 has 4 divisors (see below), whose sum is σ = 4658040. Its totient is φ = 4140448.

The previous prime is 4399237. The next prime is 4399289. The reversal of 4399243 is 3429934.

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 4399243 - 2⁹ = 4398731 is a prime.

It is a Duffinian number.

4399243 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4399199 and 4399208.

It is not an unprimeable number, because it can be changed into a prime (4399223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129373 + ... + 129406.

It is an arithmetic number, because the mean of its divisors is an integer number (1164510).

Almost surely, 2^4399243 is an apocalyptic number.

4399243 is a deficient number, since it is larger than the sum of its proper divisors (258797).

4399243 is a wasteful number, since it uses less digits than its factorization.

4399243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258796.

The product of its digits is 23328, while the sum is 34.

The square root of 4399243 is about 2097.4372457835. The cubic root of 4399243 is about 163.8548562145.

The spelling of 4399243 in words is "four million, three hundred ninety-nine thousand, two hundred forty-three".