111723823891 has 2 divisors, whose sum is σ = 111723823892. Its totient is φ = 111723823890.

The previous prime is 111723823873. The next prime is 111723823919. The reversal of 111723823891 is 198328327111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111723823891 - 2²⁹ = 111186952979 is a prime.

It is not a weakly prime, because it can be changed into another prime (111723823091) 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, 55861911945 + 55861911946.

It is an arithmetic number, because the mean of its divisors is an integer number (55861911946).

Almost surely, 2^111723823891 is an apocalyptic number.

111723823891 is a deficient number, since it is larger than the sum of its proper divisors (1).

111723823891 is an equidigital number, since it uses as much as digits as its factorization.

111723823891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The spelling of 111723823891 in words is "one hundred eleven billion, seven hundred twenty-three million, eight hundred twenty-three thousand, eight hundred ninety-one".