491808001 has 8 divisors (see below), whose sum is σ = 497447424. Its totient is φ = 486200880.

The previous prime is 491807999. The next prime is 491808007. The reversal of 491808001 is 100808194.

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 491808001 - 2¹ = 491807999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491808007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23235 + ... + 39031.

It is an arithmetic number, because the mean of its divisors is an integer number (62180928).

Almost surely, 2^491808001 is an apocalyptic number.

It is an amenable number.

491808001 is a deficient number, since it is larger than the sum of its proper divisors (5639423).

491808001 is a wasteful number, since it uses less digits than its factorization.

491808001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16151.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 491808001 is about 22176.7445987909. The cubic root of 491808001 is about 789.3419724801.

The spelling of 491808001 in words is "four hundred ninety-one million, eight hundred eight thousand, one".