28133143 has 2 divisors, whose sum is σ = 28133144. Its totient is φ = 28133142.

The previous prime is 28133141. The next prime is 28133153. The reversal of 28133143 is 34133182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28133143 - 2¹ = 28133141 is a prime.

Together with 28133141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28133141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14066571 + 14066572.

It is an arithmetic number, because the mean of its divisors is an integer number (14066572).

Almost surely, 2^28133143 is an apocalyptic number.

28133143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28133143 is an equidigital number, since it uses as much as digits as its factorization.

28133143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 28133143 is about 5304.0685327397. The cubic root of 28133143 is about 304.1394464997.

The spelling of 28133143 in words is "twenty-eight million, one hundred thirty-three thousand, one hundred forty-three".