668293 has 8 divisors (see below), whose sum is σ = 696960. Its totient is φ = 640320.

The previous prime is 668273. The next prime is 668303. The reversal of 668293 is 392866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 668293 - 2⁹ = 667781 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 (668203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2653 + ... + 2893.

It is an arithmetic number, because the mean of its divisors is an integer number (87120).

2⁶⁶⁸²⁹³ is an apocalyptic number.

It is an amenable number.

668293 is a deficient number, since it is larger than the sum of its proper divisors (28667).

668293 is a wasteful number, since it uses less digits than its factorization.

668293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its digits is 15552, while the sum is 34.

The square root of 668293 is about 817.4918959843. The cubic root of 668293 is about 87.4290254386.

It can be divided in two parts, 668 and 293, that added together give a square (961 = 31²).

The spelling of 668293 in words is "six hundred sixty-eight thousand, two hundred ninety-three".