111813193 has 2 divisors, whose sum is σ = 111813194. Its totient is φ = 111813192.

The previous prime is 111813173. The next prime is 111813197. The reversal of 111813193 is 391318111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88115769 + 23697424 = 9387^2 + 4868^2 .

It is a cyclic number.

It is not a de Polignac number, because 111813193 - 2⁹ = 111812681 is a prime.

It is not a weakly prime, because it can be changed into another prime (111813197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55906596 + 55906597.

It is an arithmetic number, because the mean of its divisors is an integer number (55906597).

Almost surely, 2^111813193 is an apocalyptic number.

It is an amenable number.

111813193 is a deficient number, since it is larger than the sum of its proper divisors (1).

111813193 is an equidigital number, since it uses as much as digits as its factorization.

111813193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 28.

The square root of 111813193 is about 10574.1757598406. The cubic root of 111813193 is about 481.7603087905.

The spelling of 111813193 in words is "one hundred eleven million, eight hundred thirteen thousand, one hundred ninety-three".