13281773 has 2 divisors, whose sum is σ = 13281774. Its totient is φ = 13281772.

The previous prime is 13281761. The next prime is 13281781. The reversal of 13281773 is 37718231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11202409 + 2079364 = 3347^2 + 1442^2 .

It is an emirp because it is prime and its reverse (37718231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13281773 - 2⁸ = 13281517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13281973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6640886 + 6640887.

It is an arithmetic number, because the mean of its divisors is an integer number (6640887).

Almost surely, 2^13281773 is an apocalyptic number.

It is an amenable number.

13281773 is a deficient number, since it is larger than the sum of its proper divisors (1).

13281773 is an equidigital number, since it uses as much as digits as its factorization.

13281773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 13281773 is about 3644.4166885799. The cubic root of 13281773 is about 236.8201677814.

The spelling of 13281773 in words is "thirteen million, two hundred eighty-one thousand, seven hundred seventy-three".