13349621 has 2 divisors, whose sum is σ = 13349622. Its totient is φ = 13349620.

The previous prime is 13349597. The next prime is 13349627. The reversal of 13349621 is 12694331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8008900 + 5340721 = 2830^2 + 2311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13349621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13349627) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6674810 + 6674811.

It is an arithmetic number, because the mean of its divisors is an integer number (6674811).

Almost surely, 2^13349621 is an apocalyptic number.

It is an amenable number.

13349621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13349621 is an equidigital number, since it uses as much as digits as its factorization.

13349621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 13349621 is about 3653.7133166137. The cubic root of 13349621 is about 237.2227368301. Note that the first 3 decimals are identical.

The spelling of 13349621 in words is "thirteen million, three hundred forty-nine thousand, six hundred twenty-one".