123783 has 16 divisors (see below), whose sum is σ = 187392. Its totient is φ = 72600.

The previous prime is 123757. The next prime is 123787. The reversal of 123783 is 387321.

It is not a de Polignac number, because 123783 - 2⁶ = 123719 is a prime.

123783 is a lucky number.

It is a plaindrome in base 13.

It is a nialpdrome in base 11.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3978 + ... + 4008.

It is an arithmetic number, because the mean of its divisors is an integer number (11712).

2¹²³⁷⁸³ is an apocalyptic number.

123783 is a deficient number, since it is larger than the sum of its proper divisors (63609).

123783 is an equidigital number, since it uses as much as digits as its factorization.

123783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 45 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 123783 is about 351.8280830178. The cubic root of 123783 is about 49.8372038569.

Multiplying 123783 by its sum of digits (24), we get a palindrome (2970792).

The spelling of 123783 in words is "one hundred twenty-three thousand, seven hundred eighty-three".