491696843 has 4 divisors (see below), whose sum is σ = 536396568. Its totient is φ = 446997120.

The previous prime is 491696837. The next prime is 491696867. The reversal of 491696843 is 348696194.

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 491696843 - 2⁸ = 491696587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491696791 and 491696800.

It is not an unprimeable number, because it can be changed into a prime (491696833) 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 3 ways as a sum of consecutive naturals, for example, 22349846 + ... + 22349867.

It is an arithmetic number, because the mean of its divisors is an integer number (134099142).

Almost surely, 2^491696843 is an apocalyptic number.

491696843 is a deficient number, since it is larger than the sum of its proper divisors (44699725).

491696843 is a wasteful number, since it uses less digits than its factorization.

491696843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44699724.

The product of its digits is 1119744, while the sum is 50.

The square root of 491696843 is about 22174.2382732756. The cubic root of 491696843 is about 789.2824992127.

The spelling of 491696843 in words is "four hundred ninety-one million, six hundred ninety-six thousand, eight hundred forty-three".