494666209 has 8 divisors (see below), whose sum is σ = 508336488. Its totient is φ = 481011840.

The previous prime is 494666203. The next prime is 494666213. The reversal of 494666209 is 902666494.

It can be written as a sum of positive squares in 4 ways, for example, as 237160000 + 257506209 = 15400^2 + 16047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 494666209 - 2¹¹ = 494664161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (494666203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87579 + ... + 93055.

It is an arithmetic number, because the mean of its divisors is an integer number (63542061).

Almost surely, 2^494666209 is an apocalyptic number.

It is an amenable number.

494666209 is a deficient number, since it is larger than the sum of its proper divisors (13670279).

494666209 is a wasteful number, since it uses less digits than its factorization.

494666209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 494666209 is about 22241.0928013891. The cubic root of 494666209 is about 790.8681419360.

The spelling of 494666209 in words is "four hundred ninety-four million, six hundred sixty-six thousand, two hundred nine".