22785839 has 2 divisors, whose sum is σ = 22785840. Its totient is φ = 22785838.

The previous prime is 22785809. The next prime is 22785857. The reversal of 22785839 is 93858722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22785839 - 2²⁰ = 21737263 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22785839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22785809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11392919 + 11392920.

It is an arithmetic number, because the mean of its divisors is an integer number (11392920).

Almost surely, 2^22785839 is an apocalyptic number.

22785839 is a deficient number, since it is larger than the sum of its proper divisors (1).

22785839 is an equidigital number, since it uses as much as digits as its factorization.

22785839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 22785839 is about 4773.4514766571. The cubic root of 22785839 is about 283.5012696075.

The spelling of 22785839 in words is "twenty-two million, seven hundred eighty-five thousand, eight hundred thirty-nine".