112643989 has 16 divisors (see below), whose sum is σ = 126100800. Its totient is φ = 99995904.

The previous prime is 112643963. The next prime is 112644011. The reversal of 112643989 is 989346211.

It is a happy number.

It is not a de Polignac number, because 112643989 - 2⁵ = 112643957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112643939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88842 + ... + 90100.

It is an arithmetic number, because the mean of its divisors is an integer number (7881300).

Almost surely, 2^112643989 is an apocalyptic number.

112643989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

112643989 is a deficient number, since it is larger than the sum of its proper divisors (13456811).

112643989 is a wasteful number, since it uses less digits than its factorization.

112643989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 93312, while the sum is 43.

The square root of 112643989 is about 10613.3872538413. The cubic root of 112643989 is about 482.9505598325.

The spelling of 112643989 in words is "one hundred twelve million, six hundred forty-three thousand, nine hundred eighty-nine".