491243433 has 8 divisors (see below), whose sum is σ = 656642688. Its totient is φ = 326669904.

The previous prime is 491243387. The next prime is 491243443. The reversal of 491243433 is 334342194.

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

It is not a de Polignac number, because 491243433 - 2²⁰ = 490194857 is a prime.

It is a super-2 number, since 2×491243433² = 482640220931250978, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 491243394 and 491243403.

It is not an unprimeable number, because it can be changed into a prime (491243443) 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, 205041 + ... + 207422.

It is an arithmetic number, because the mean of its divisors is an integer number (82080336).

Almost surely, 2^491243433 is an apocalyptic number.

It is an amenable number.

491243433 is a deficient number, since it is larger than the sum of its proper divisors (165399255).

491243433 is a wasteful number, since it uses less digits than its factorization.

491243433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412863.

The product of its digits is 31104, while the sum is 33.

The square root of 491243433 is about 22164.0121142360. The cubic root of 491243433 is about 789.0398167277.

The spelling of 491243433 in words is "four hundred ninety-one million, two hundred forty-three thousand, four hundred thirty-three".