491447 has 8 divisors (see below), whose sum is σ = 549120. Its totient is φ = 435960.

The previous prime is 491429. The next prime is 491461. The reversal of 491447 is 744194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491447 - 2¹⁶ = 425911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47 + ... + 992.

It is an arithmetic number, because the mean of its divisors is an integer number (68640).

2⁴⁹¹⁴⁴⁷ is an apocalyptic number.

491447 is a deficient number, since it is larger than the sum of its proper divisors (57673).

491447 is a wasteful number, since it uses less digits than its factorization.

491447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093.

The product of its digits is 4032, while the sum is 29.

The square root of 491447 is about 701.0328095032. The cubic root of 491447 is about 78.9148792085.

The spelling of 491447 in words is "four hundred ninety-one thousand, four hundred forty-seven".