111919849 has 2 divisors, whose sum is σ = 111919850. Its totient is φ = 111919848.

The previous prime is 111919807. The next prime is 111919883. The reversal of 111919849 is 948919111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71825625 + 40094224 = 8475^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 111919849 - 2⁹ = 111919337 is a prime.

It is not a weakly prime, because it can be changed into another prime (111919649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55959924 + 55959925.

It is an arithmetic number, because the mean of its divisors is an integer number (55959925).

Almost surely, 2^111919849 is an apocalyptic number.

It is an amenable number.

111919849 is a deficient number, since it is larger than the sum of its proper divisors (1).

111919849 is an equidigital number, since it uses as much as digits as its factorization.

111919849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 43.

The square root of 111919849 is about 10579.2177877195. The cubic root of 111919849 is about 481.9134400899.

The spelling of 111919849 in words is "one hundred eleven million, nine hundred nineteen thousand, eight hundred forty-nine".