213783 has 4 divisors (see below), whose sum is σ = 285048. Its totient is φ = 142520.

The previous prime is 213751. The next prime is 213791. The reversal of 213783 is 387312.

213783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213783 - 2⁵ = 213751 is a prime.

It is a D-number.

213783 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35628 + ... + 35633.

It is an arithmetic number, because the mean of its divisors is an integer number (71262).

2²¹³⁷⁸³ is an apocalyptic number.

213783 is a deficient number, since it is larger than the sum of its proper divisors (71265).

213783 is an equidigital number, since it uses as much as digits as its factorization.

213783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71264.

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

The square root of 213783 is about 462.3667375580. The cubic root of 213783 is about 59.7940158738.

The spelling of 213783 in words is "two hundred thirteen thousand, seven hundred eighty-three".