13303321 has 2 divisors, whose sum is σ = 13303322. Its totient is φ = 13303320.

The previous prime is 13303289. The next prime is 13303327. The reversal of 13303321 is 12330331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8637721 + 4665600 = 2939^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 13303321 - 2⁵ = 13303289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13303295 and 13303304.

It is not a weakly prime, because it can be changed into another prime (13303327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6651660 + 6651661.

It is an arithmetic number, because the mean of its divisors is an integer number (6651661).

Almost surely, 2^13303321 is an apocalyptic number.

It is an amenable number.

13303321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13303321 is an equidigital number, since it uses as much as digits as its factorization.

13303321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 13303321 is about 3647.3717934973. The cubic root of 13303321 is about 236.9481688598.

Adding to 13303321 its reverse (12330331), we get a palindrome (25633652).

The spelling of 13303321 in words is "thirteen million, three hundred three thousand, three hundred twenty-one".