217039 has 6 divisors (see below), whose sum is σ = 230864. Its totient is φ = 204000.

The previous prime is 217033. The next prime is 217057. The reversal of 217039 is 930712.

It is not a de Polignac number, because 217039 - 2⁷ = 216911 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 (217033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87 + ... + 664.

2²¹⁷⁰³⁹ is an apocalyptic number.

217039 is a deficient number, since it is larger than the sum of its proper divisors (13825).

217039 is an equidigital number, since it uses as much as digits as its factorization.

217039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 217039 is about 465.8744466055. The cubic root of 217039 is about 60.0960498621.

It can be divided in two parts, 21703 and 9, that added together give a palindrome (21712).

The spelling of 217039 in words is "two hundred seventeen thousand, thirty-nine".