494578169 has 2 divisors, whose sum is σ = 494578170. Its totient is φ = 494578168.

The previous prime is 494578141. The next prime is 494578171. The reversal of 494578169 is 961875494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430770025 + 63808144 = 20755^2 + 7988^2 .

It is a cyclic number.

It is not a de Polignac number, because 494578169 - 2⁸ = 494577913 is a prime.

It is a super-2 number, since 2×494578169² = 489215130502785122, which contains 22 as substring.

Together with 494578171, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 494578169.

It is not a weakly prime, because it can be changed into another prime (494578129) 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 as a sum of consecutive naturals, namely, 247289084 + 247289085.

It is an arithmetic number, because the mean of its divisors is an integer number (247289085).

Almost surely, 2^494578169 is an apocalyptic number.

It is an amenable number.

494578169 is a deficient number, since it is larger than the sum of its proper divisors (1).

494578169 is an equidigital number, since it uses as much as digits as its factorization.

494578169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 494578169 is about 22239.1134940222. The cubic root of 494578169 is about 790.8212199503.

The spelling of 494578169 in words is "four hundred ninety-four million, five hundred seventy-eight thousand, one hundred sixty-nine".