28003271 has 2 divisors, whose sum is σ = 28003272. Its totient is φ = 28003270.

The previous prime is 28003249. The next prime is 28003273. The reversal of 28003271 is 17230082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28003271 is a prime.

Together with 28003273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28003273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14001635 + 14001636.

It is an arithmetic number, because the mean of its divisors is an integer number (14001636).

Almost surely, 2^28003271 is an apocalyptic number.

28003271 is a deficient number, since it is larger than the sum of its proper divisors (1).

28003271 is an equidigital number, since it uses as much as digits as its factorization.

28003271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 28003271 is about 5291.8116935507. The cubic root of 28003271 is about 303.6707213492.

The spelling of 28003271 in words is "twenty-eight million, three thousand, two hundred seventy-one".