13791229 has 2 divisors, whose sum is σ = 13791230. Its totient is φ = 13791228.

The previous prime is 13791227. The next prime is 13791241. The reversal of 13791229 is 92219731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 1750329 = 3470^2 + 1323^2 .

It is an emirp because it is prime and its reverse (92219731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13791229 - 2¹ = 13791227 is a prime.

Together with 13791227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13791194 and 13791203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13791221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6895614 + 6895615.

It is an arithmetic number, because the mean of its divisors is an integer number (6895615).

Almost surely, 2^13791229 is an apocalyptic number.

It is an amenable number.

13791229 is a deficient number, since it is larger than the sum of its proper divisors (1).

13791229 is an equidigital number, since it uses as much as digits as its factorization.

13791229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 13791229 is about 3713.6543996446. The cubic root of 13791229 is about 239.8102029533.

The spelling of 13791229 in words is "thirteen million, seven hundred ninety-one thousand, two hundred twenty-nine".