493393993 has 2 divisors, whose sum is σ = 493393994. Its totient is φ = 493393992.

The previous prime is 493393987. The next prime is 493394021. The reversal of 493393993 is 399393394.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415018384 + 78375609 = 20372^2 + 8853^2 .

It is a cyclic number.

It is not a de Polignac number, because 493393993 - 2¹⁷ = 493262921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493393993.

It is not a weakly prime, because it can be changed into another prime (493393913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246696996 + 246696997.

It is an arithmetic number, because the mean of its divisors is an integer number (246696997).

Almost surely, 2^493393993 is an apocalyptic number.

It is an amenable number.

493393993 is a deficient number, since it is larger than the sum of its proper divisors (1).

493393993 is an equidigital number, since it uses as much as digits as its factorization.

493393993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2125764, while the sum is 52.

The square root of 493393993 is about 22212.4738154038. The cubic root of 493393993 is about 790.1895571407.

The spelling of 493393993 in words is "four hundred ninety-three million, three hundred ninety-three thousand, nine hundred ninety-three".