111287728943 has 2 divisors, whose sum is σ = 111287728944. Its totient is φ = 111287728942.

The previous prime is 111287728933. The next prime is 111287728961. The reversal of 111287728943 is 349827782111.

It is a weak prime.

It is an emirp because it is prime and its reverse (349827782111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111287728943 - 2⁶ = 111287728879 is a prime.

It is a super-2 number, since 2×111287728943² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111287728933) 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, 55643864471 + 55643864472.

It is an arithmetic number, because the mean of its divisors is an integer number (55643864472).

Almost surely, 2^111287728943 is an apocalyptic number.

111287728943 is a deficient number, since it is larger than the sum of its proper divisors (1).

111287728943 is an equidigital number, since it uses as much as digits as its factorization.

111287728943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 53.

The spelling of 111287728943 in words is "one hundred eleven billion, two hundred eighty-seven million, seven hundred twenty-eight thousand, nine hundred forty-three".