28347173 has 2 divisors, whose sum is σ = 28347174. Its totient is φ = 28347172.

The previous prime is 28347139. The next prime is 28347197. The reversal of 28347173 is 37174382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28281124 + 66049 = 5318^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28347173 - 2²⁰ = 27298597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28347133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14173586 + 14173587.

It is an arithmetic number, because the mean of its divisors is an integer number (14173587).

Almost surely, 2^28347173 is an apocalyptic number.

It is an amenable number.

28347173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28347173 is an equidigital number, since it uses as much as digits as its factorization.

28347173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 28347173 is about 5324.2063258292. The cubic root of 28347173 is about 304.9087714254.

The spelling of 28347173 in words is "twenty-eight million, three hundred forty-seven thousand, one hundred seventy-three".