491932491 has 8 divisors (see below), whose sum is σ = 657216000. Its totient is φ = 327301992.

The previous prime is 491932433. The next prime is 491932499. The reversal of 491932491 is 194239194.

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

It is not a de Polignac number, because 491932491 - 2¹¹ = 491930443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491932499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161491 + ... + 164508.

It is an arithmetic number, because the mean of its divisors is an integer number (82152000).

Almost surely, 2^491932491 is an apocalyptic number.

491932491 is a deficient number, since it is larger than the sum of its proper divisors (165283509).

491932491 is a wasteful number, since it uses less digits than its factorization.

491932491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326505.

The product of its digits is 69984, while the sum is 42.

The square root of 491932491 is about 22179.5511902293. The cubic root of 491932491 is about 789.4085681786.

The spelling of 491932491 in words is "four hundred ninety-one million, nine hundred thirty-two thousand, four hundred ninety-one".