28143013 has 2 divisors, whose sum is σ = 28143014. Its totient is φ = 28143012.

The previous prime is 28143001. The next prime is 28143061. The reversal of 28143013 is 31034182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14615329 + 13527684 = 3823^2 + 3678^2 .

It is a cyclic number.

It is not a de Polignac number, because 28143013 - 2⁵ = 28142981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28143613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14071506 + 14071507.

It is an arithmetic number, because the mean of its divisors is an integer number (14071507).

Almost surely, 2^28143013 is an apocalyptic number.

It is an amenable number.

28143013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28143013 is an equidigital number, since it uses as much as digits as its factorization.

28143013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 28143013 is about 5304.9988689914. The cubic root of 28143013 is about 304.1750096000.

Adding to 28143013 its reverse (31034182), we get a palindrome (59177195).

The spelling of 28143013 in words is "twenty-eight million, one hundred forty-three thousand, thirteen".