494711209 has 4 divisors (see below), whose sum is σ = 516220416. Its totient is φ = 473202004.

The previous prime is 494711171. The next prime is 494711213. The reversal of 494711209 is 902117494.

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, and also an emirpimes, since its reverse is a distinct semiprime: 902117494 = 2 ⋅451058747.

It is a cyclic number.

It is not a de Polignac number, because 494711209 - 2¹⁷ = 494580137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494711249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10754569 + ... + 10754614.

It is an arithmetic number, because the mean of its divisors is an integer number (129055104).

Almost surely, 2^494711209 is an apocalyptic number.

It is an amenable number.

494711209 is a deficient number, since it is larger than the sum of its proper divisors (21509207).

494711209 is a wasteful number, since it uses less digits than its factorization.

494711209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21509206.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 494711209 is about 22242.1044193215. The cubic root of 494711209 is about 790.8921230817.

The spelling of 494711209 in words is "four hundred ninety-four million, seven hundred eleven thousand, two hundred nine".