4399321 has 4 divisors (see below), whose sum is σ = 4412944. Its totient is φ = 4385700.

The previous prime is 4399313. The next prime is 4399327. The reversal of 4399321 is 1239934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1239934 = 2 ⋅619967.

It is a cyclic number.

It is not a de Polignac number, because 4399321 - 2³ = 4399313 is a prime.

It is a super-2 number, since 2×4399321² = 38708050522082, which contains 22 as substring.

It is a Duffinian number.

4399321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4399327) 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, 6315 + ... + 6976.

It is an arithmetic number, because the mean of its divisors is an integer number (1103236).

Almost surely, 2^4399321 is an apocalyptic number.

It is an amenable number.

4399321 is a deficient number, since it is larger than the sum of its proper divisors (13623).

4399321 is a wasteful number, since it uses less digits than its factorization.

4399321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13622.

The product of its digits is 5832, while the sum is 31.

The square root of 4399321 is about 2097.4558398212. The cubic root of 4399321 is about 163.8558246086.

The spelling of 4399321 in words is "four million, three hundred ninety-nine thousand, three hundred twenty-one".