13399231 has 2 divisors, whose sum is σ = 13399232. Its totient is φ = 13399230.

The previous prime is 13399229. The next prime is 13399241. The reversal of 13399231 is 13299331.

It is a weak prime.

It is an emirp because it is prime and its reverse (13299331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13399231 - 2¹ = 13399229 is a prime.

It is a super-2 number, since 2×13399231² = 359078782782722, which contains 22 as substring.

Together with 13399229, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13399193 and 13399202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13399241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6699615 + 6699616.

It is an arithmetic number, because the mean of its divisors is an integer number (6699616).

Almost surely, 2^13399231 is an apocalyptic number.

13399231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13399231 is an equidigital number, since it uses as much as digits as its factorization.

13399231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 31.

The square root of 13399231 is about 3660.4960046420. The cubic root of 13399231 is about 237.5162301005.

The spelling of 13399231 in words is "thirteen million, three hundred ninety-nine thousand, two hundred thirty-one".