493185881 has 2 divisors, whose sum is σ = 493185882. Its totient is φ = 493185880.

The previous prime is 493185863. The next prime is 493185911. The reversal of 493185881 is 188581394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485982025 + 7203856 = 22045^2 + 2684^2 .

It is a cyclic number.

It is not a de Polignac number, because 493185881 - 2⁶ = 493185817 is a prime.

It is a super-2 number, since 2×493185881² = 486464626435492322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (493181881) by changing a digit.

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 as a sum of consecutive naturals, namely, 246592940 + 246592941.

It is an arithmetic number, because the mean of its divisors is an integer number (246592941).

Almost surely, 2^493185881 is an apocalyptic number.

It is an amenable number.

493185881 is a deficient number, since it is larger than the sum of its proper divisors (1).

493185881 is an equidigital number, since it uses as much as digits as its factorization.

493185881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 47.

The square root of 493185881 is about 22207.7887462935. The cubic root of 493185881 is about 790.0784417116.

The spelling of 493185881 in words is "four hundred ninety-three million, one hundred eighty-five thousand, eight hundred eighty-one".