617213 has 4 divisors (see below), whose sum is σ = 620160. Its totient is φ = 614268.

The previous prime is 617191. The next prime is 617231. The reversal of 617213 is 312716.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617213 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 (617233) 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 3 ways as a sum of consecutive naturals, for example, 1133 + ... + 1586.

It is an arithmetic number, because the mean of its divisors is an integer number (155040).

2⁶¹⁷²¹³ is an apocalyptic number.

It is an amenable number.

617213 is a deficient number, since it is larger than the sum of its proper divisors (2947).

617213 is a wasteful number, since it uses less digits than its factorization.

617213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946.

The product of its digits is 252, while the sum is 20.

The square root of 617213 is about 785.6290473245. The cubic root of 617213 is about 85.1422301555.

Adding to 617213 its reverse (312716), we get a palindrome (929929).

The spelling of 617213 in words is "six hundred seventeen thousand, two hundred thirteen".