13331287 has 2 divisors, whose sum is σ = 13331288. Its totient is φ = 13331286.

The previous prime is 13331251. The next prime is 13331291. The reversal of 13331287 is 78213331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13331287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665643 + 6665644.

It is an arithmetic number, because the mean of its divisors is an integer number (6665644).

Almost surely, 2^13331287 is an apocalyptic number.

13331287 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331287 is an equidigital number, since it uses as much as digits as its factorization.

13331287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 13331287 is about 3651.2035002174. The cubic root of 13331287 is about 237.1140886965.

The spelling of 13331287 in words is "thirteen million, three hundred thirty-one thousand, two hundred eighty-seven".