491784941 has 8 divisors (see below), whose sum is σ = 493910040. Its totient is φ = 489665088.

The previous prime is 491784913. The next prime is 491784949. The reversal of 491784941 is 149487194.

It can be written as a sum of positive squares in 4 ways, for example, as 9060100 + 482724841 = 3010^2 + 21971^2 .

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 491784941 - 2²² = 487590637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491784949) 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, 439715 + ... + 440831.

It is an arithmetic number, because the mean of its divisors is an integer number (61738755).

Almost surely, 2^491784941 is an apocalyptic number.

It is an amenable number.

491784941 is a deficient number, since it is larger than the sum of its proper divisors (2125099).

491784941 is a wasteful number, since it uses less digits than its factorization.

491784941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623.

The product of its digits is 290304, while the sum is 47.

The square root of 491784941 is about 22176.2246786959. The cubic root of 491784941 is about 789.3296353415.

The spelling of 491784941 in words is "four hundred ninety-one million, seven hundred eighty-four thousand, nine hundred forty-one".