111796991 has 2 divisors, whose sum is σ = 111796992. Its totient is φ = 111796990.

The previous prime is 111796961. The next prime is 111797011. The reversal of 111796991 is 199697111.

It is a strong prime.

It is an emirp because it is prime and its reverse (199697111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111796991 - 2¹⁰ = 111795967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111796961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55898495 + 55898496.

It is an arithmetic number, because the mean of its divisors is an integer number (55898496).

Almost surely, 2^111796991 is an apocalyptic number.

111796991 is a deficient number, since it is larger than the sum of its proper divisors (1).

111796991 is an equidigital number, since it uses as much as digits as its factorization.

111796991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 44.

The square root of 111796991 is about 10573.4096203637. The cubic root of 111796991 is about 481.7370382582.

The spelling of 111796991 in words is "one hundred eleven million, seven hundred ninety-six thousand, nine hundred ninety-one".