493221313 has 4 divisors (see below), whose sum is σ = 531161428. Its totient is φ = 455281200.

The previous prime is 493221277. The next prime is 493221317. The reversal of 493221313 is 313122394.

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 169833024 + 323388289 = 13032^2 + 17983^2 .

It is a cyclic number.

It is not a de Polignac number, because 493221313 - 2²⁵ = 459666881 is a prime.

It is a super-3 number, since 3×493221313³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (493221317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18970038 + ... + 18970063.

It is an arithmetic number, because the mean of its divisors is an integer number (132790357).

Almost surely, 2^493221313 is an apocalyptic number.

It is an amenable number.

493221313 is a deficient number, since it is larger than the sum of its proper divisors (37940115).

493221313 is a wasteful number, since it uses less digits than its factorization.

493221313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37940114.

The product of its digits is 3888, while the sum is 28.

The square root of 493221313 is about 22208.5864701021. The cubic root of 493221313 is about 790.0973618187.

The spelling of 493221313 in words is "four hundred ninety-three million, two hundred twenty-one thousand, three hundred thirteen".