491841769 has 8 divisors (see below), whose sum is σ = 509211720. Its totient is φ = 474499200.

The previous prime is 491841761. The next prime is 491841787. The reversal of 491841769 is 967148194.

It can be written as a sum of positive squares in 4 ways, for example, as 153760000 + 338081769 = 12400^2 + 18387^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 491841769 - 2³ = 491841761 is a prime.

It is a super-2 number, since 2×491841769² = 483816651466098722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491841761) 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, 33909 + ... + 46189.

It is an arithmetic number, because the mean of its divisors is an integer number (63651465).

Almost surely, 2^491841769 is an apocalyptic number.

It is an amenable number.

491841769 is a deficient number, since it is larger than the sum of its proper divisors (17369951).

491841769 is a wasteful number, since it uses less digits than its factorization.

491841769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13691.

The product of its digits is 435456, while the sum is 49.

The square root of 491841769 is about 22177.5059237958. The cubic root of 491841769 is about 789.3600377207.

The spelling of 491841769 in words is "four hundred ninety-one million, eight hundred forty-one thousand, seven hundred sixty-nine".