111111097943 has 2 divisors, whose sum is σ = 111111097944. Its totient is φ = 111111097942.

The previous prime is 111111097931. The next prime is 111111097957. The reversal of 111111097943 is 349790111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111111097943 - 2¹⁶ = 111111032407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111111097897 and 111111097906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111097243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555548971 + 55555548972.

It is an arithmetic number, because the mean of its divisors is an integer number (55555548972).

Almost surely, 2^111111097943 is an apocalyptic number.

111111097943 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111097943 is an equidigital number, since it uses as much as digits as its factorization.

111111097943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 38.

The spelling of 111111097943 in words is "one hundred eleven billion, one hundred eleven million, ninety-seven thousand, nine hundred forty-three".