491832001 has 4 divisors (see below), whose sum is σ = 496902532. Its totient is φ = 486761472.

The previous prime is 491831999. The next prime is 491832007. The reversal of 491832001 is 100238194.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 290873025 + 200958976 = 17055^2 + 14176^2 .

It is a cyclic number.

It is not a de Polignac number, because 491832001 - 2¹ = 491831999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491832007) 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, 2535120 + ... + 2535313.

It is an arithmetic number, because the mean of its divisors is an integer number (124225633).

Almost surely, 2^491832001 is an apocalyptic number.

It is an amenable number.

491832001 is a deficient number, since it is larger than the sum of its proper divisors (5070531).

491832001 is an equidigital number, since it uses as much as digits as its factorization.

491832001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070530.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 491832001 is about 22177.2856995621. The cubic root of 491832001 is about 789.3548121107.

The spelling of 491832001 in words is "four hundred ninety-one million, eight hundred thirty-two thousand, one".