23091143 has 2 divisors, whose sum is σ = 23091144. Its totient is φ = 23091142.

The previous prime is 23091119. The next prime is 23091157. The reversal of 23091143 is 34119032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23091143 - 2¹⁸ = 22828999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23091113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11545571 + 11545572.

It is an arithmetic number, because the mean of its divisors is an integer number (11545572).

Almost surely, 2^23091143 is an apocalyptic number.

23091143 is a deficient number, since it is larger than the sum of its proper divisors (1).

23091143 is an equidigital number, since it uses as much as digits as its factorization.

23091143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 23091143 is about 4805.3244427406. The cubic root of 23091143 is about 284.7618529723.

The spelling of 23091143 in words is "twenty-three million, ninety-one thousand, one hundred forty-three".