4385639 has 2 divisors, whose sum is σ = 4385640. Its totient is φ = 4385638.

The previous prime is 4385629. The next prime is 4385669. The reversal of 4385639 is 9365834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4385639 - 2²⁰ = 3337063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4385629) 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, 2192819 + 2192820.

It is an arithmetic number, because the mean of its divisors is an integer number (2192820).

Almost surely, 2^4385639 is an apocalyptic number.

4385639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4385639 is an equidigital number, since it uses as much as digits as its factorization.

4385639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 4385639 is about 2094.1917295224. The cubic root of 4385639 is about 163.6857829504.

The spelling of 4385639 in words is "four million, three hundred eighty-five thousand, six hundred thirty-nine".