494713809 has 6 divisors (see below), whose sum is σ = 714586626. Its totient is φ = 329809200.

The previous prime is 494713789. The next prime is 494713859. The reversal of 494713809 is 908317494.

It can be written as a sum of positive squares in only one way, i.e., 486070209 + 8643600 = 22047^2 + 2940^2 .

It is not a de Polignac number, because 494713809 - 2⁵ = 494713777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (494713859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27484092 + ... + 27484109.

It is an arithmetic number, because the mean of its divisors is an integer number (119097771).

Almost surely, 2^494713809 is an apocalyptic number.

It is an amenable number.

494713809 is a deficient number, since it is larger than the sum of its proper divisors (219872817).

494713809 is a wasteful number, since it uses less digits than its factorization.

494713809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54968207 (or 54968204 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 494713809 is about 22242.1628669516. The cubic root of 494713809 is about 790.8935086146.

The spelling of 494713809 in words is "four hundred ninety-four million, seven hundred thirteen thousand, eight hundred nine".