491373849 has 16 divisors (see below), whose sum is σ = 666764864. Its totient is φ = 321796800.

The previous prime is 491373847. The next prime is 491373893. The reversal of 491373849 is 948373194.

It is a happy number.

It is not a de Polignac number, because 491373849 - 2¹ = 491373847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491373798 and 491373807.

It is not an unprimeable number, because it can be changed into a prime (491373847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213147 + ... + 215439.

It is an arithmetic number, because the mean of its divisors is an integer number (41672804).

Almost surely, 2^491373849 is an apocalyptic number.

It is an amenable number.

491373849 is a deficient number, since it is larger than the sum of its proper divisors (175391015).

491373849 is a wasteful number, since it uses less digits than its factorization.

491373849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528.

The product of its digits is 653184, while the sum is 48.

The square root of 491373849 is about 22166.9539856066. The cubic root of 491373849 is about 789.1096356842.

The spelling of 491373849 in words is "four hundred ninety-one million, three hundred seventy-three thousand, eight hundred forty-nine".