111428459993 has 2 divisors, whose sum is σ = 111428459994. Its totient is φ = 111428459992.

The previous prime is 111428459957. The next prime is 111428460001. The reversal of 111428459993 is 399954824111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111227586064 + 200873929 = 333508^2 + 14173^2 .

It is a cyclic number.

It is not a de Polignac number, because 111428459993 - 2¹⁸ = 111428197849 is a prime.

It is not a weakly prime, because it can be changed into another prime (111428459893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55714229996 + 55714229997.

It is an arithmetic number, because the mean of its divisors is an integer number (55714229997).

Almost surely, 2^111428459993 is an apocalyptic number.

It is an amenable number.

111428459993 is a deficient number, since it is larger than the sum of its proper divisors (1).

111428459993 is an equidigital number, since it uses as much as digits as its factorization.

111428459993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 56.

The spelling of 111428459993 in words is "one hundred eleven billion, four hundred twenty-eight million, four hundred fifty-nine thousand, nine hundred ninety-three".