4309439 has 4 divisors (see below), whose sum is σ = 4314720. Its totient is φ = 4304160.

The previous prime is 4309433. The next prime is 4309451. The reversal of 4309439 is 9349034.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9349034 = 2 ⋅4674517.

It is a cyclic number.

It is not a de Polignac number, because 4309439 - 2⁴ = 4309423 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 (4309433) 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, 1127 + ... + 3144.

It is an arithmetic number, because the mean of its divisors is an integer number (1078680).

Almost surely, 2^4309439 is an apocalyptic number.

4309439 is a deficient number, since it is larger than the sum of its proper divisors (5281).

4309439 is a wasteful number, since it uses less digits than its factorization.

4309439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 4309439 is about 2075.9188327100. The cubic root of 4309439 is about 162.7322312702.

The spelling of 4309439 in words is "four million, three hundred nine thousand, four hundred thirty-nine".