494774909 has 2 divisors, whose sum is σ = 494774910. Its totient is φ = 494774908.

The previous prime is 494774879. The next prime is 494774933. The reversal of 494774909 is 909477494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415956025 + 78818884 = 20395^2 + 8878^2 .

It is a cyclic number.

It is not a de Polignac number, because 494774909 - 2²⁰ = 493726333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494774939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247387454 + 247387455.

It is an arithmetic number, because the mean of its divisors is an integer number (247387455).

Almost surely, 2^494774909 is an apocalyptic number.

It is an amenable number.

494774909 is a deficient number, since it is larger than the sum of its proper divisors (1).

494774909 is an equidigital number, since it uses as much as digits as its factorization.

494774909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 494774909 is about 22243.5363420478. The cubic root of 494774909 is about 790.9260672395.

The spelling of 494774909 in words is "four hundred ninety-four million, seven hundred seventy-four thousand, nine hundred nine".