13649213 has 2 divisors, whose sum is σ = 13649214. Its totient is φ = 13649212.

The previous prime is 13649203. The next prime is 13649231. The reversal of 13649213 is 31294631.

13649213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (13649231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9078169 + 4571044 = 3013^2 + 2138^2 .

It is a cyclic number.

It is not a de Polignac number, because 13649213 - 2⁴ = 13649197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13649203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6824606 + 6824607.

It is an arithmetic number, because the mean of its divisors is an integer number (6824607).

Almost surely, 2^13649213 is an apocalyptic number.

It is an amenable number.

13649213 is a deficient number, since it is larger than the sum of its proper divisors (1).

13649213 is an equidigital number, since it uses as much as digits as its factorization.

13649213 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 13649213 is about 3694.4841317835. The cubic root of 13649213 is about 238.9842079165.

The spelling of 13649213 in words is "thirteen million, six hundred forty-nine thousand, two hundred thirteen".