493635209 has 2 divisors, whose sum is σ = 493635210. Its totient is φ = 493635208.

The previous prime is 493635199. The next prime is 493635211. The reversal of 493635209 is 902536394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491065600 + 2569609 = 22160^2 + 1603^2 .

It is a cyclic number.

It is not a de Polignac number, because 493635209 - 2⁴ = 493635193 is a prime.

Together with 493635211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (493635509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246817604 + 246817605.

It is an arithmetic number, because the mean of its divisors is an integer number (246817605).

Almost surely, 2^493635209 is an apocalyptic number.

It is an amenable number.

493635209 is a deficient number, since it is larger than the sum of its proper divisors (1).

493635209 is an equidigital number, since it uses as much as digits as its factorization.

493635209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 493635209 is about 22217.9028938377. The cubic root of 493635209 is about 790.3183084115.

The spelling of 493635209 in words is "four hundred ninety-three million, six hundred thirty-five thousand, two hundred nine".