28111093 has 2 divisors, whose sum is σ = 28111094. Its totient is φ = 28111092.

The previous prime is 28111091. The next prime is 28111103. The reversal of 28111093 is 39011182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21178404 + 6932689 = 4602^2 + 2633^2 .

It is a cyclic number.

It is not a de Polignac number, because 28111093 - 2¹ = 28111091 is a prime.

Together with 28111091, 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 (28111091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14055546 + 14055547.

It is an arithmetic number, because the mean of its divisors is an integer number (14055547).

Almost surely, 2^28111093 is an apocalyptic number.

It is an amenable number.

28111093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28111093 is an equidigital number, since it uses as much as digits as its factorization.

28111093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 28111093 is about 5301.9895322416. The cubic root of 28111093 is about 304.0599669617.

The spelling of 28111093 in words is "twenty-eight million, one hundred eleven thousand, ninety-three".