4390039 has 2 divisors, whose sum is σ = 4390040. Its totient is φ = 4390038.

The previous prime is 4390021. The next prime is 4390051. The reversal of 4390039 is 9300934.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4390039 - 2¹¹ = 4387991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4389989 and 4390016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4390069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195019 + 2195020.

It is an arithmetic number, because the mean of its divisors is an integer number (2195020).

Almost surely, 2^4390039 is an apocalyptic number.

4390039 is a deficient number, since it is larger than the sum of its proper divisors (1).

4390039 is an equidigital number, since it uses as much as digits as its factorization.

4390039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 4390039 is about 2095.2419907972. The cubic root of 4390039 is about 163.7405052475.

The spelling of 4390039 in words is "four million, three hundred ninety thousand, thirty-nine".