13682621 has 2 divisors, whose sum is σ = 13682622. Its totient is φ = 13682620.

The previous prime is 13682587. The next prime is 13682629. The reversal of 13682621 is 12628631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 6446521 = 2690^2 + 2539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13682621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13682629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6841310 + 6841311.

It is an arithmetic number, because the mean of its divisors is an integer number (6841311).

Almost surely, 2^13682621 is an apocalyptic number.

It is an amenable number.

13682621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13682621 is an equidigital number, since it uses as much as digits as its factorization.

13682621 is an evil number, because the sum of its binary digits is even.

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

The square root of 13682621 is about 3699.0027034324. The cubic root of 13682621 is about 239.1790293898.

The spelling of 13682621 in words is "thirteen million, six hundred eighty-two thousand, six hundred twenty-one".