213943 has 2 divisors, whose sum is σ = 213944. Its totient is φ = 213942.

The previous prime is 213929. The next prime is 213947. The reversal of 213943 is 349312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213947) 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 as a sum of consecutive naturals, namely, 106971 + 106972.

It is an arithmetic number, because the mean of its divisors is an integer number (106972).

2²¹³⁹⁴³ is an apocalyptic number.

213943 is a deficient number, since it is larger than the sum of its proper divisors (1).

213943 is an equidigital number, since it uses as much as digits as its factorization.

213943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

The square root of 213943 is about 462.5397280234. The cubic root of 213943 is about 59.8089292155.

It can be divided in two parts, 213 and 943, that added together give a square (1156 = 34²).

The spelling of 213943 in words is "two hundred thirteen thousand, nine hundred forty-three".