321493 has 4 divisors (see below), whose sum is σ = 330220. Its totient is φ = 312768.

The previous prime is 321469. The next prime is 321509. The reversal of 321493 is 394123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 33124 = 537^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 321493 - 2¹³ = 313301 is a prime.

It is a Duffinian number.

321493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321403) 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, 4308 + ... + 4381.

It is an arithmetic number, because the mean of its divisors is an integer number (82555).

2³²¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

321493 is a deficient number, since it is larger than the sum of its proper divisors (8727).

321493 is an equidigital number, since it uses as much as digits as its factorization.

321493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8726.

The product of its digits is 648, while the sum is 22.

The square root of 321493 is about 567.0035273259. The cubic root of 321493 is about 68.5052476133.

The spelling of 321493 in words is "three hundred twenty-one thousand, four hundred ninety-three".