111985973 has 8 divisors (see below), whose sum is σ = 122301696. Its totient is φ = 101692800.

The previous prime is 111985969. The next prime is 111985997. The reversal of 111985973 is 379589111.

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

It is not a de Polignac number, because 111985973 - 2² = 111985969 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111981973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5765 + ... + 16037.

It is an arithmetic number, because the mean of its divisors is an integer number (15287712).

Almost surely, 2^111985973 is an apocalyptic number.

111985973 is the 5657-th centered heptagonal number.

It is an amenable number.

111985973 is a deficient number, since it is larger than the sum of its proper divisors (10315723).

111985973 is a wasteful number, since it uses less digits than its factorization.

111985973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11275.

The product of its digits is 68040, while the sum is 44.

The square root of 111985973 is about 10582.3425100495. The cubic root of 111985973 is about 482.0083287416.

It can be divided in two parts, 11198 and 5973, that added together give a palindrome (17171).

The spelling of 111985973 in words is "one hundred eleven million, nine hundred eighty-five thousand, nine hundred seventy-three".