491785343 has 4 divisors (see below), whose sum is σ = 562040400. Its totient is φ = 421530288.

The previous prime is 491785339. The next prime is 491785351. The reversal of 491785343 is 343587194.

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

It is a cyclic number.

It is not a de Polignac number, because 491785343 - 2² = 491785339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491785294 and 491785303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491785313) 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, 35127518 + ... + 35127531.

It is an arithmetic number, because the mean of its divisors is an integer number (140510100).

Almost surely, 2^491785343 is an apocalyptic number.

491785343 is a deficient number, since it is larger than the sum of its proper divisors (70255057).

491785343 is an equidigital number, since it uses as much as digits as its factorization.

491785343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70255056.

The product of its digits is 362880, while the sum is 44.

The square root of 491785343 is about 22176.2337424550. The cubic root of 491785343 is about 789.3298504155.

The spelling of 491785343 in words is "four hundred ninety-one million, seven hundred eighty-five thousand, three hundred forty-three".