22139309 has 2 divisors, whose sum is σ = 22139310. Its totient is φ = 22139308.

The previous prime is 22139297. The next prime is 22139311. The reversal of 22139309 is 90393122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20675209 + 1464100 = 4547^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 22139309 - 2¹⁶ = 22073773 is a prime.

Together with 22139311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22139339) 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, 11069654 + 11069655.

It is an arithmetic number, because the mean of its divisors is an integer number (11069655).

Almost surely, 2^22139309 is an apocalyptic number.

It is an amenable number.

22139309 is a deficient number, since it is larger than the sum of its proper divisors (1).

22139309 is an equidigital number, since it uses as much as digits as its factorization.

22139309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 22139309 is about 4705.2427142497. The cubic root of 22139309 is about 280.7941273937.

The spelling of 22139309 in words is "twenty-two million, one hundred thirty-nine thousand, three hundred nine".