13796821 has 2 divisors, whose sum is σ = 13796822. Its totient is φ = 13796820.

The previous prime is 13796807. The next prime is 13796863. The reversal of 13796821 is 12869731.

13796821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13793796 + 3025 = 3714^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 13796821 - 2¹³ = 13788629 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 (13796221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6898410 + 6898411.

It is an arithmetic number, because the mean of its divisors is an integer number (6898411).

Almost surely, 2^13796821 is an apocalyptic number.

It is an amenable number.

13796821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13796821 is an equidigital number, since it uses as much as digits as its factorization.

13796821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 13796821 is about 3714.4072205400. The cubic root of 13796821 is about 239.8426109291.

The spelling of 13796821 in words is "thirteen million, seven hundred ninety-six thousand, eight hundred twenty-one".