13281889 has 2 divisors, whose sum is σ = 13281890. Its totient is φ = 13281888.

The previous prime is 13281823. The next prime is 13281901. The reversal of 13281889 is 98818231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 501264 = 3575^2 + 708^2 .

It is a cyclic number.

It is not a de Polignac number, because 13281889 - 2⁷ = 13281761 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (13281689) 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, 6640944 + 6640945.

It is an arithmetic number, because the mean of its divisors is an integer number (6640945).

Almost surely, 2^13281889 is an apocalyptic number.

It is an amenable number.

13281889 is a deficient number, since it is larger than the sum of its proper divisors (1).

13281889 is an equidigital number, since it uses as much as digits as its factorization.

13281889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 40.

The square root of 13281889 is about 3644.4326033005. The cubic root of 13281889 is about 236.8208572240.

The spelling of 13281889 in words is "thirteen million, two hundred eighty-one thousand, eight hundred eighty-nine".