28333013 has 2 divisors, whose sum is σ = 28333014. Its totient is φ = 28333012.

The previous prime is 28333007. The next prime is 28333031. The reversal of 28333013 is 31033382.

Together with next prime (28333031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14922769 + 13410244 = 3863^2 + 3662^2 .

It is a cyclic number.

It is not a de Polignac number, because 28333013 - 2¹² = 28328917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28333013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28333093) 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, 14166506 + 14166507.

It is an arithmetic number, because the mean of its divisors is an integer number (14166507).

Almost surely, 2^28333013 is an apocalyptic number.

It is an amenable number.

28333013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28333013 is an equidigital number, since it uses as much as digits as its factorization.

28333013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 28333013 is about 5322.8763840615. The cubic root of 28333013 is about 304.8579935542.

Adding to 28333013 its reverse (31033382), we get a palindrome (59366395).

The spelling of 28333013 in words is "twenty-eight million, three hundred thirty-three thousand, thirteen".