111944169 has 12 divisors (see below), whose sum is σ = 162053892. Its totient is φ = 74464800.

The previous prime is 111944153. The next prime is 111944191. The reversal of 111944169 is 961449111.

It can be written as a sum of positive squares in 2 ways, for example, as 22924944 + 89019225 = 4788^2 + 9435^2 .

It is not a de Polignac number, because 111944169 - 2⁴ = 111944153 is a prime.

It is a super-2 number, since 2×111944169² = 25062993946201122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111944969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9342 + ... + 17639.

It is an arithmetic number, because the mean of its divisors is an integer number (13504491).

Almost surely, 2^111944169 is an apocalyptic number.

It is an amenable number.

111944169 is a deficient number, since it is larger than the sum of its proper divisors (50109723).

111944169 is a wasteful number, since it uses less digits than its factorization.

111944169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27448 (or 27445 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 111944169 is about 10580.3671486390. The cubic root of 111944169 is about 481.9483438957.

The spelling of 111944169 in words is "one hundred eleven million, nine hundred forty-four thousand, one hundred sixty-nine".