493221317 has 2 divisors, whose sum is σ = 493221318. Its totient is φ = 493221316.

The previous prime is 493221277. The next prime is 493221319. The reversal of 493221317 is 713122394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 468679201 + 24542116 = 21649^2 + 4954^2 .

It is a cyclic number.

It is not a de Polignac number, because 493221317 - 2²⁰ = 492172741 is a prime.

Together with 493221319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493221319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246610658 + 246610659.

It is an arithmetic number, because the mean of its divisors is an integer number (246610659).

Almost surely, 2^493221317 is an apocalyptic number.

It is an amenable number.

493221317 is a deficient number, since it is larger than the sum of its proper divisors (1).

493221317 is an equidigital number, since it uses as much as digits as its factorization.

493221317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 493221317 is about 22208.5865601573. The cubic root of 493221317 is about 790.0973639545.

The spelling of 493221317 in words is "four hundred ninety-three million, two hundred twenty-one thousand, three hundred seventeen".