491313 has 4 divisors (see below), whose sum is σ = 655088. Its totient is φ = 327540.

The previous prime is 491299. The next prime is 491327. The reversal of 491313 is 313194.

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 an interprime number because it is at equal distance from previous prime (491299) and next prime (491327).

It is not a de Polignac number, because 491313 - 2⁴ = 491297 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491313.

It is not an unprimeable number, because it can be changed into a prime (491333) 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, 81883 + ... + 81888.

It is an arithmetic number, because the mean of its divisors is an integer number (163772).

2⁴⁹¹³¹³ is an apocalyptic number.

It is an amenable number.

491313 is a deficient number, since it is larger than the sum of its proper divisors (163775).

491313 is a wasteful number, since it uses less digits than its factorization.

491313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163774.

The product of its digits is 324, while the sum is 21.

The square root of 491313 is about 700.9372297146. The cubic root of 491313 is about 78.9077061359.

The spelling of 491313 in words is "four hundred ninety-one thousand, three hundred thirteen".