491580447 has 8 divisors (see below), whose sum is σ = 671427120. Its totient is φ = 319727040.

The previous prime is 491580443. The next prime is 491580487. The reversal of 491580447 is 744085194.

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

It is not a de Polignac number, because 491580447 - 2² = 491580443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491580399 and 491580408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491580443) 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 7 ways as a sum of consecutive naturals, for example, 1998172 + ... + 1998417.

It is an arithmetic number, because the mean of its divisors is an integer number (83928390).

Almost surely, 2^491580447 is an apocalyptic number.

491580447 is a deficient number, since it is larger than the sum of its proper divisors (179846673).

491580447 is a wasteful number, since it uses less digits than its factorization.

491580447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996633.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 491580447 is about 22171.6135407417. The cubic root of 491580447 is about 789.2202138315.

The spelling of 491580447 in words is "four hundred ninety-one million, five hundred eighty thousand, four hundred forty-seven".