111897 has 6 divisors (see below), whose sum is σ = 161642. Its totient is φ = 74592.

The previous prime is 111893. The next prime is 111913. The reversal of 111897 is 798111.

It can be written as a sum of positive squares in only one way, i.e., 76176 + 35721 = 276^2 + 189^2 .

It is not a de Polignac number, because 111897 - 2² = 111893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111897.

It is not an unprimeable number, because it can be changed into a prime (111893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6208 + ... + 6225.

2¹¹¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

111897 is a deficient number, since it is larger than the sum of its proper divisors (49745).

111897 is a wasteful number, since it uses less digits than its factorization.

111897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12439 (or 12436 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 111897 is about 334.5100895339. The cubic root of 111897 is about 48.1880642840.

The spelling of 111897 in words is "one hundred eleven thousand, eight hundred ninety-seven".