494395217 has 2 divisors, whose sum is σ = 494395218. Its totient is φ = 494395216.

The previous prime is 494395177. The next prime is 494395229. The reversal of 494395217 is 712593494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493550656 + 844561 = 22216^2 + 919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494395217 is a prime.

It is not a weakly prime, because it can be changed into another prime (494395117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247197608 + 247197609.

It is an arithmetic number, because the mean of its divisors is an integer number (247197609).

Almost surely, 2^494395217 is an apocalyptic number.

It is an amenable number.

494395217 is a deficient number, since it is larger than the sum of its proper divisors (1).

494395217 is an equidigital number, since it uses as much as digits as its factorization.

494395217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 494395217 is about 22234.9998201034. Note that the first 3 decimals coincide. The cubic root of 494395217 is about 790.7236956514.

The spelling of 494395217 in words is "four hundred ninety-four million, three hundred ninety-five thousand, two hundred seventeen".