13696021 has 2 divisors, whose sum is σ = 13696022. Its totient is φ = 13696020.

The previous prime is 13696019. The next prime is 13696043. The reversal of 13696021 is 12069631.

13696021 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., 12327121 + 1368900 = 3511^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 13696021 - 2¹ = 13696019 is a prime.

Together with 13696019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13696421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6848010 + 6848011.

It is an arithmetic number, because the mean of its divisors is an integer number (6848011).

Almost surely, 2^13696021 is an apocalyptic number.

It is an amenable number.

13696021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13696021 is an equidigital number, since it uses as much as digits as its factorization.

13696021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13696021 is about 3700.8135592056. The cubic root of 13696021 is about 239.2570834726.

The spelling of 13696021 in words is "thirteen million, six hundred ninety-six thousand, twenty-one".