111992291 has 2 divisors, whose sum is σ = 111992292. Its totient is φ = 111992290.

The previous prime is 111992281. The next prime is 111992317. The reversal of 111992291 is 192299111.

It is a weak prime.

It is an emirp because it is prime and its reverse (192299111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111992291 - 2²⁶ = 44883427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111992261) 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, 55996145 + 55996146.

It is an arithmetic number, because the mean of its divisors is an integer number (55996146).

Almost surely, 2^111992291 is an apocalyptic number.

111992291 is a deficient number, since it is larger than the sum of its proper divisors (1).

111992291 is an equidigital number, since it uses as much as digits as its factorization.

111992291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 35.

The square root of 111992291 is about 10582.6410219756. The cubic root of 111992291 is about 482.0173931844.

The spelling of 111992291 in words is "one hundred eleven million, nine hundred ninety-two thousand, two hundred ninety-one".