28273171 has 2 divisors, whose sum is σ = 28273172. Its totient is φ = 28273170.

The previous prime is 28273117. The next prime is 28273177. The reversal of 28273171 is 17137282.

Together with previous prime (28273117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28273171 - 2⁷ = 28273043 is a prime.

It is not a weakly prime, because it can be changed into another prime (28273177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14136585 + 14136586.

It is an arithmetic number, because the mean of its divisors is an integer number (14136586).

Almost surely, 2^28273171 is an apocalyptic number.

28273171 is a deficient number, since it is larger than the sum of its proper divisors (1).

28273171 is an equidigital number, since it uses as much as digits as its factorization.

28273171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 28273171 is about 5317.2522039113. The cubic root of 28273171 is about 304.6432126434.

The spelling of 28273171 in words is "twenty-eight million, two hundred seventy-three thousand, one hundred seventy-one".