491470689 has 8 divisors (see below), whose sum is σ = 659692800. Its totient is φ = 325447856.

The previous prime is 491470673. The next prime is 491470709. The reversal of 491470689 is 986074194.

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 491470689 - 2⁴ = 491470673 is a prime.

It is a super-2 number, since 2×491470689² = 483086876292269442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491470489) 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, 549297 + ... + 550190.

It is an arithmetic number, because the mean of its divisors is an integer number (82461600).

Almost surely, 2^491470689 is an apocalyptic number.

It is an amenable number.

491470689 is a deficient number, since it is larger than the sum of its proper divisors (168222111).

491470689 is a wasteful number, since it uses less digits than its factorization.

491470689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099639.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 491470689 is about 22169.1382105846. The cubic root of 491470689 is about 789.1614715439.

The spelling of 491470689 in words is "four hundred ninety-one million, four hundred seventy thousand, six hundred eighty-nine".