494218217 has 4 divisors (see below), whose sum is σ = 494466960. Its totient is φ = 493969476.

The previous prime is 494218211. The next prime is 494218229. The reversal of 494218217 is 712812494.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 494218217 - 2⁸ = 494217961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494218211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121367 + ... + 125372.

It is an arithmetic number, because the mean of its divisors is an integer number (123616740).

Almost surely, 2^494218217 is an apocalyptic number.

It is an amenable number.

494218217 is a deficient number, since it is larger than the sum of its proper divisors (248743).

494218217 is a wasteful number, since it uses less digits than its factorization.

494218217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248742.

The product of its digits is 32256, while the sum is 38.

The square root of 494218217 is about 22231.0192523870. The cubic root of 494218217 is about 790.6293212218.

The spelling of 494218217 in words is "four hundred ninety-four million, two hundred eighteen thousand, two hundred seventeen".