22123639 has 2 divisors, whose sum is σ = 22123640. Its totient is φ = 22123638.

The previous prime is 22123609. The next prime is 22123649. The reversal of 22123639 is 93632122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22123639 - 2¹³ = 22115447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22123609) 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, 11061819 + 11061820.

It is an arithmetic number, because the mean of its divisors is an integer number (11061820).

Almost surely, 2^22123639 is an apocalyptic number.

22123639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22123639 is an equidigital number, since it uses as much as digits as its factorization.

22123639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 22123639 is about 4703.5772556640. The cubic root of 22123639 is about 280.7278639211.

The spelling of 22123639 in words is "twenty-two million, one hundred twenty-three thousand, six hundred thirty-nine".