13821263 has 2 divisors, whose sum is σ = 13821264. Its totient is φ = 13821262.

The previous prime is 13821253. The next prime is 13821293. The reversal of 13821263 is 36212831.

It is a weak prime.

It is an emirp because it is prime and its reverse (36212831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13821263 - 2⁸ = 13821007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13821233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6910631 + 6910632.

It is an arithmetic number, because the mean of its divisors is an integer number (6910632).

Almost surely, 2^13821263 is an apocalyptic number.

13821263 is a deficient number, since it is larger than the sum of its proper divisors (1).

13821263 is an equidigital number, since it uses as much as digits as its factorization.

13821263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 13821263 is about 3717.6959262425. The cubic root of 13821263 is about 239.9841598342.

The spelling of 13821263 in words is "thirteen million, eight hundred twenty-one thousand, two hundred sixty-three".