493990213 has 6 divisors (see below), whose sum is σ = 495220082. Its totient is φ = 492762720.

The previous prime is 493990207. The next prime is 493990243. The reversal of 493990213 is 312099394.

It can be written as a sum of positive squares in 3 ways, for example, as 163405089 + 330585124 = 12783^2 + 18182^2 .

It is a de Polignac number, because none of the positive numbers 2^k-493990213 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 (493990243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 578695 + ... + 579547.

Almost surely, 2^493990213 is an apocalyptic number.

It is an amenable number.

493990213 is a deficient number, since it is larger than the sum of its proper divisors (1229869).

493990213 is an frugal number, since it uses more digits than its factorization.

493990213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 493990213 is about 22225.8906008286. The cubic root of 493990213 is about 790.5077188134.

The spelling of 493990213 in words is "four hundred ninety-three million, nine hundred ninety thousand, two hundred thirteen".