111131997 has 8 divisors (see below), whose sum is σ = 149487744. Its totient is φ = 73432128.

The previous prime is 111131981. The next prime is 111132001. The reversal of 111131997 is 799131111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111131997 - 2⁴ = 111131981 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111131927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163573 + ... + 164250.

It is an arithmetic number, because the mean of its divisors is an integer number (18685968).

Almost surely, 2^111131997 is an apocalyptic number.

It is an amenable number.

111131997 is a deficient number, since it is larger than the sum of its proper divisors (38355747).

111131997 is a wasteful number, since it uses less digits than its factorization.

111131997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327939.

The product of its digits is 1701, while the sum is 33.

The square root of 111131997 is about 10541.9161920402. The cubic root of 111131997 is about 480.7799775462.

The spelling of 111131997 in words is "one hundred eleven million, one hundred thirty-one thousand, nine hundred ninety-seven".