112861989 has 24 divisors (see below), whose sum is σ = 172186560. Its totient is φ = 71092032.

The previous prime is 112861949. The next prime is 112861999. The reversal of 112861989 is 989168211.

112861989 is a `hidden beast` number, since 1 + 1 + 28 + 619 + 8 + 9 = 666.

It is not a de Polignac number, because 112861989 - 2¹¹ = 112859941 is a prime.

It is a super-2 number, since 2×112861989² = 25475657122072242, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112861949) 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 23 ways as a sum of consecutive naturals, for example, 13897 + ... + 20465.

It is an arithmetic number, because the mean of its divisors is an integer number (7174440).

Almost surely, 2^112861989 is an apocalyptic number.

It is an amenable number.

112861989 is a deficient number, since it is larger than the sum of its proper divisors (59324571).

112861989 is a wasteful number, since it uses less digits than its factorization.

112861989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681 (or 6678 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The square root of 112861989 is about 10623.6523380615. The cubic root of 112861989 is about 483.2619105984.

The spelling of 112861989 in words is "one hundred twelve million, eight hundred sixty-one thousand, nine hundred eighty-nine".