4223539 has 2 divisors, whose sum is σ = 4223540. Its totient is φ = 4223538.

The previous prime is 4223537. The next prime is 4223543. The reversal of 4223539 is 9353224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4223539 - 2¹ = 4223537 is a prime.

Together with 4223537, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4223537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111769 + 2111770.

It is an arithmetic number, because the mean of its divisors is an integer number (2111770).

Almost surely, 2^4223539 is an apocalyptic number.

4223539 is a deficient number, since it is larger than the sum of its proper divisors (1).

4223539 is an equidigital number, since it uses as much as digits as its factorization.

4223539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 4223539 is about 2055.1250570221. The cubic root of 4223539 is about 161.6437198923.

The spelling of 4223539 in words is "four million, two hundred twenty-three thousand, five hundred thirty-nine".