111783 has 8 divisors (see below), whose sum is σ = 170368. Its totient is φ = 63864.

The previous prime is 111781. The next prime is 111791. The reversal of 111783 is 387111.

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

It is not a de Polignac number, because 111783 - 2¹ = 111781 is a prime.

It is a super-3 number, since 3×111783³ = 4190333003057061, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5323 = 111783 / (1 + 1 + 1 + 7 + 8 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111781) 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, 2641 + ... + 2682.

It is an arithmetic number, because the mean of its divisors is an integer number (21296).

2¹¹¹⁷⁸³ is an apocalyptic number.

111783 is a deficient number, since it is larger than the sum of its proper divisors (58585).

111783 is an equidigital number, since it uses as much as digits as its factorization.

111783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333.

The product of its digits is 168, while the sum is 21.

The square root of 111783 is about 334.3396476639. The cubic root of 111783 is about 48.1716941521.

Adding to 111783 its reverse (387111), we get a palindrome (498894).

The spelling of 111783 in words is "one hundred eleven thousand, seven hundred eighty-three".