111984361 has 2 divisors, whose sum is σ = 111984362. Its totient is φ = 111984360.

The previous prime is 111984359. The next prime is 111984413. The reversal of 111984361 is 163489111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111936400 + 47961 = 10580^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 111984361 - 2¹ = 111984359 is a prime.

Together with 111984359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111988361) 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, 55992180 + 55992181.

It is an arithmetic number, because the mean of its divisors is an integer number (55992181).

Almost surely, 2^111984361 is an apocalyptic number.

It is an amenable number.

111984361 is a deficient number, since it is larger than the sum of its proper divisors (1).

111984361 is an equidigital number, since it uses as much as digits as its factorization.

111984361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 111984361 is about 10582.2663451644. The cubic root of 111984361 is about 482.0060159485.

The spelling of 111984361 in words is "one hundred eleven million, nine hundred eighty-four thousand, three hundred sixty-one".