13334821 has 2 divisors, whose sum is σ = 13334822. Its totient is φ = 13334820.

The previous prime is 13334819. The next prime is 13334831. The reversal of 13334821 is 12843331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13322500 + 12321 = 3650^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 13334821 - 2¹ = 13334819 is a prime.

It is a super-2 number, since 2×13334821² = 355634902204082, which contains 22 as substring.

Together with 13334819, 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 (13334801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6667410 + 6667411.

It is an arithmetic number, because the mean of its divisors is an integer number (6667411).

Almost surely, 2^13334821 is an apocalyptic number.

It is an amenable number.

13334821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13334821 is an equidigital number, since it uses as much as digits as its factorization.

13334821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 13334821 is about 3651.6874181671. The cubic root of 13334821 is about 237.1350390907.

The spelling of 13334821 in words is "thirteen million, three hundred thirty-four thousand, eight hundred twenty-one".