213839 has 4 divisors (see below), whose sum is σ = 218856. Its totient is φ = 208824.

The previous prime is 213833. The next prime is 213847. The reversal of 213839 is 938312.

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 213839 - 2¹² = 209743 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213833) 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, 2444 + ... + 2529.

It is an arithmetic number, because the mean of its divisors is an integer number (54714).

2²¹³⁸³⁹ is an apocalyptic number.

213839 is a deficient number, since it is larger than the sum of its proper divisors (5017).

213839 is an equidigital number, since it uses as much as digits as its factorization.

213839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016.

The product of its digits is 1296, while the sum is 26.

The square root of 213839 is about 462.4272915821. The cubic root of 213839 is about 59.7992363895.

The spelling of 213839 in words is "two hundred thirteen thousand, eight hundred thirty-nine".