494084009 has 2 divisors, whose sum is σ = 494084010. Its totient is φ = 494084008.

The previous prime is 494083973. The next prime is 494084011. The reversal of 494084009 is 900480494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494083984 + 25 = 22228^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 494084009 - 2¹² = 494079913 is a prime.

Together with 494084011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (494084089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247042004 + 247042005.

It is an arithmetic number, because the mean of its divisors is an integer number (247042005).

Almost surely, 2^494084009 is an apocalyptic number.

It is an amenable number.

494084009 is a deficient number, since it is larger than the sum of its proper divisors (1).

494084009 is an equidigital number, since it uses as much as digits as its factorization.

494084009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 494084009 is about 22228.0005623538. Note that the first 3 decimals coincide. The cubic root of 494084009 is about 790.5577479892.

The spelling of 494084009 in words is "four hundred ninety-four million, eighty-four thousand, nine".