13339561 has 2 divisors, whose sum is σ = 13339562. Its totient is φ = 13339560.

The previous prime is 13339559. The next prime is 13339619. The reversal of 13339561 is 16593331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12425625 + 913936 = 3525^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 13339561 - 2¹ = 13339559 is a prime.

Together with 13339559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13339531) 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, 6669780 + 6669781.

It is an arithmetic number, because the mean of its divisors is an integer number (6669781).

Almost surely, 2^13339561 is an apocalyptic number.

It is an amenable number.

13339561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13339561 is an equidigital number, since it uses as much as digits as its factorization.

13339561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 31.

The square root of 13339561 is about 3652.3363755273. The cubic root of 13339561 is about 237.1631331294.

The spelling of 13339561 in words is "thirteen million, three hundred thirty-nine thousand, five hundred sixty-one".