491317 has 4 divisors (see below), whose sum is σ = 520236. Its totient is φ = 462400.

The previous prime is 491299. The next prime is 491327. The reversal of 491317 is 713194.

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 461041 + 30276 = 679^2 + 174^2 .

It is a de Polignac number, because none of the positive numbers 2^k-491317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491291 and 491300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491327) 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, 14434 + ... + 14467.

It is an arithmetic number, because the mean of its divisors is an integer number (130059).

2⁴⁹¹³¹⁷ is an apocalyptic number.

It is an amenable number.

491317 is a deficient number, since it is larger than the sum of its proper divisors (28919).

491317 is a wasteful number, since it uses less digits than its factorization.

491317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28918.

The product of its digits is 756, while the sum is 25.

The square root of 491317 is about 700.9400830314. The cubic root of 491317 is about 78.9079202764.

It can be divided in two parts, 4913 and 17, that multiplied together give a 4-th power (83521 = 17⁴).

The spelling of 491317 in words is "four hundred ninety-one thousand, three hundred seventeen".