494438849 has 2 divisors, whose sum is σ = 494438850. Its totient is φ = 494438848.

The previous prime is 494438827. The next prime is 494438851. The reversal of 494438849 is 948834494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 391050625 + 103388224 = 19775^2 + 10168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494438849 is a prime.

Together with 494438851, 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 494438849.

It is not a weakly prime, because it can be changed into another prime (494432849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247219424 + 247219425.

It is an arithmetic number, because the mean of its divisors is an integer number (247219425).

Almost surely, 2^494438849 is an apocalyptic number.

It is an amenable number.

494438849 is a deficient number, since it is larger than the sum of its proper divisors (1).

494438849 is an equidigital number, since it uses as much as digits as its factorization.

494438849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 53.

The square root of 494438849 is about 22235.9809543002. The cubic root of 494438849 is about 790.7469562873.

The spelling of 494438849 in words is "four hundred ninety-four million, four hundred thirty-eight thousand, eight hundred forty-nine".