491443375 has 8 divisors (see below), whose sum is σ = 613321488. Its totient is φ = 393154600.

The previous prime is 491443331. The next prime is 491443387. The reversal of 491443375 is 573344194.

It is not a de Polignac number, because 491443375 - 2¹⁷ = 491312303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1965649 + ... + 1965898.

It is an arithmetic number, because the mean of its divisors is an integer number (76665186).

Almost surely, 2^491443375 is an apocalyptic number.

491443375 is a deficient number, since it is larger than the sum of its proper divisors (121878113).

491443375 is an equidigital number, since it uses as much as digits as its factorization.

491443375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931562 (or 3931552 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 491443375 is about 22168.5221654489. The cubic root of 491443375 is about 789.1468517803.

The spelling of 491443375 in words is "four hundred ninety-one million, four hundred forty-three thousand, three hundred seventy-five".