8191123 has 2 divisors, whose sum is σ = 8191124. Its totient is φ = 8191122.

The previous prime is 8191091. The next prime is 8191129. The reversal of 8191123 is 3211918.

8191123 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8191123 - 2⁵ = 8191091 is a prime.

It is a super-3 number, since 3×8191123³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (8191129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4095561 + 4095562.

It is an arithmetic number, because the mean of its divisors is an integer number (4095562).

Almost surely, 2^8191123 is an apocalyptic number.

8191123 is a deficient number, since it is larger than the sum of its proper divisors (1).

8191123 is an equidigital number, since it uses as much as digits as its factorization.

8191123 is an odious number, because the sum of its binary digits is odd.

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

The square root of 8191123 is about 2862.0138015041. The cubic root of 8191123 is about 201.5801740366.

It can be divided in two parts, 81 and 91123, that added together give a square (91204 = 302²).

The spelling of 8191123 in words is "eight million, one hundred ninety-one thousand, one hundred twenty-three".