504494909 has 2 divisors, whose sum is σ = 504494910. Its totient is φ = 504494908.

The previous prime is 504494891. The next prime is 504494911. The reversal of 504494909 is 909494405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494395225 + 10099684 = 22235^2 + 3178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-504494909 is a prime.

It is a super-2 number, since 2×504494909² = 509030226413836562, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 504494911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 504494909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504494929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252247454 + 252247455.

It is an arithmetic number, because the mean of its divisors is an integer number (252247455).

Almost surely, 2^504494909 is an apocalyptic number.

It is an amenable number.

504494909 is a deficient number, since it is larger than the sum of its proper divisors (1).

504494909 is an equidigital number, since it uses as much as digits as its factorization.

504494909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 504494909 is about 22460.9641155494. The cubic root of 504494909 is about 796.0718419750.

The spelling of 504494909 in words is "five hundred four million, four hundred ninety-four thousand, nine hundred nine".