13622309 has 2 divisors, whose sum is σ = 13622310. Its totient is φ = 13622308.

The previous prime is 13622303. The next prime is 13622317. The reversal of 13622309 is 90322631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7756225 + 5866084 = 2785^2 + 2422^2 .

It is a cyclic number.

It is not a de Polignac number, because 13622309 - 2⁴ = 13622293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13622303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6811154 + 6811155.

It is an arithmetic number, because the mean of its divisors is an integer number (6811155).

Almost surely, 2^13622309 is an apocalyptic number.

It is an amenable number.

13622309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13622309 is an equidigital number, since it uses as much as digits as its factorization.

13622309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13622309 is about 3690.8412320229. The cubic root of 13622309 is about 238.8270838330.

It can be divided in two parts, 13622 and 309, that added together give a palindrome (13931).

The spelling of 13622309 in words is "thirteen million, six hundred twenty-two thousand, three hundred nine".