111201989 has 8 divisors (see below), whose sum is σ = 112764960. Its totient is φ = 109644496.

The previous prime is 111201971. The next prime is 111202019. The reversal of 111201989 is 989102111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111201989 is a prime.

It is a super-2 number, since 2×111201989² = 24731764715112242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201949) 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 7 ways as a sum of consecutive naturals, for example, 55202 + ... + 57180.

It is an arithmetic number, because the mean of its divisors is an integer number (14095620).

Almost surely, 2^111201989 is an apocalyptic number.

It is an amenable number.

111201989 is a deficient number, since it is larger than the sum of its proper divisors (1562971).

111201989 is an equidigital number, since it uses as much as digits as its factorization.

111201989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 111201989 is about 10545.2353695875. The cubic root of 111201989 is about 480.8808896479.

The spelling of 111201989 in words is "one hundred eleven million, two hundred one thousand, nine hundred eighty-nine".