646293 has 8 divisors (see below), whose sum is σ = 866656. Its totient is φ = 428400.

The previous prime is 646291. The next prime is 646301. The reversal of 646293 is 392646.

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

It is not a de Polignac number, because 646293 - 2¹ = 646291 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 646293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646291) 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 in 7 ways as a sum of consecutive naturals, for example, 123 + ... + 1143.

It is an arithmetic number, because the mean of its divisors is an integer number (108332).

2⁶⁴⁶²⁹³ is an apocalyptic number.

It is an amenable number.

646293 is a deficient number, since it is larger than the sum of its proper divisors (220363).

646293 is a wasteful number, since it uses less digits than its factorization.

646293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its digits is 7776, while the sum is 30.

The square root of 646293 is about 803.9235038236. The cubic root of 646293 is about 86.4589222134.

It can be divided in two parts, 6462 and 93, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 646293 in words is "six hundred forty-six thousand, two hundred ninety-three".