491347 has 4 divisors (see below), whose sum is σ = 508320. Its totient is φ = 474376.

The previous prime is 491341. The next prime is 491353. The reversal of 491347 is 743194.

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

It is an interprime number because it is at equal distance from previous prime (491341) and next prime (491353).

It is a cyclic number.

It is not a de Polignac number, because 491347 - 2³ = 491339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491341) 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, 8443 + ... + 8500.

It is an arithmetic number, because the mean of its divisors is an integer number (127080).

2⁴⁹¹³⁴⁷ is an apocalyptic number.

491347 is a deficient number, since it is larger than the sum of its proper divisors (16973).

491347 is a wasteful number, since it uses less digits than its factorization.

491347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16972.

The product of its digits is 3024, while the sum is 28.

The square root of 491347 is about 700.9614825367. The cubic root of 491347 is about 78.9095262927.

It can be divided in two parts, 49134 and 7, that added together give a triangular number (49141 = T₃₁₃).

The spelling of 491347 in words is "four hundred ninety-one thousand, three hundred forty-seven".