22639 has 2 divisors, whose sum is σ = 22640. Its totient is φ = 22638.

The previous prime is 22637. The next prime is 22643. The reversal of 22639 is 93622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22639 - 2¹ = 22637 is a prime.

Together with 22637, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11319 + 11320.

It is an arithmetic number, because the mean of its divisors is an integer number (11320).

2²²⁶³⁹ is an apocalyptic number.

22639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22639 is an equidigital number, since it uses as much as digits as its factorization.

22639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

The square root of 22639 is about 150.4626199426. The cubic root of 22639 is about 28.2890966750.

The spelling of 22639 in words is "twenty-two thousand, six hundred thirty-nine".