111996091 has 2 divisors, whose sum is σ = 111996092. Its totient is φ = 111996090.

The previous prime is 111996067. The next prime is 111996109. The reversal of 111996091 is 190699111.

Together with next prime (111996109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111996091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111996091.

It is not a weakly prime, because it can be changed into another prime (111996011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55998045 + 55998046.

It is an arithmetic number, because the mean of its divisors is an integer number (55998046).

Almost surely, 2^111996091 is an apocalyptic number.

111996091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111996091 is an equidigital number, since it uses as much as digits as its factorization.

111996091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 37.

The square root of 111996091 is about 10582.8205597563. The cubic root of 111996091 is about 482.0228448852.

The spelling of 111996091 in words is "one hundred eleven million, nine hundred ninety-six thousand, ninety-one".