13822639 has 2 divisors, whose sum is σ = 13822640. Its totient is φ = 13822638.

The previous prime is 13822637. The next prime is 13822657. The reversal of 13822639 is 93622831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13822639 - 2¹ = 13822637 is a prime.

Together with 13822637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13822631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6911319 + 6911320.

It is an arithmetic number, because the mean of its divisors is an integer number (6911320).

Almost surely, 2^13822639 is an apocalyptic number.

13822639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13822639 is an equidigital number, since it uses as much as digits as its factorization.

13822639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 13822639 is about 3717.8809824953. The cubic root of 13822639 is about 239.9921235841.

The spelling of 13822639 in words is "thirteen million, eight hundred twenty-two thousand, six hundred thirty-nine".