213743 has 4 divisors (see below), whose sum is σ = 214968. Its totient is φ = 212520.

The previous prime is 213737. The next prime is 213751. The reversal of 213743 is 347312.

213743 is nontrivially palindromic in base 14.

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 213743 - 2⁴ = 213727 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (53742).

2²¹³⁷⁴³ is an apocalyptic number.

213743 is a deficient number, since it is larger than the sum of its proper divisors (1225).

213743 is a wasteful number, since it uses less digits than its factorization.

213743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224.

The product of its digits is 504, while the sum is 20.

The square root of 213743 is about 462.3234798277. The cubic root of 213743 is about 59.7902863758.

The spelling of 213743 in words is "two hundred thirteen thousand, seven hundred forty-three".