13826621 has 2 divisors, whose sum is σ = 13826622. Its totient is φ = 13826620.

The previous prime is 13826599. The next prime is 13826629. The reversal of 13826621 is 12662831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13060996 + 765625 = 3614^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 13826621 - 2⁶ = 13826557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13826629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6913310 + 6913311.

It is an arithmetic number, because the mean of its divisors is an integer number (6913311).

Almost surely, 2^13826621 is an apocalyptic number.

It is an amenable number.

13826621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13826621 is an equidigital number, since it uses as much as digits as its factorization.

13826621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 13826621 is about 3718.4164640341. The cubic root of 13826621 is about 240.0151668656.

The spelling of 13826621 in words is "thirteen million, eight hundred twenty-six thousand, six hundred twenty-one".