449085869 has 2 divisors, whose sum is σ = 449085870. Its totient is φ = 449085868.

The previous prime is 449085841. The next prime is 449085877. The reversal of 449085869 is 968580944.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259693225 + 189392644 = 16115^2 + 13762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449085869 is a prime.

It is a super-2 number, since 2×449085869² = 403356235470970322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 449085869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449085569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224542934 + 224542935.

It is an arithmetic number, because the mean of its divisors is an integer number (224542935).

Almost surely, 2^449085869 is an apocalyptic number.

It is an amenable number.

449085869 is a deficient number, since it is larger than the sum of its proper divisors (1).

449085869 is an equidigital number, since it uses as much as digits as its factorization.

449085869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 449085869 is about 21191.6462078811. The cubic root of 449085869 is about 765.7901864076.

The spelling of 449085869 in words is "four hundred forty-nine million, eighty-five thousand, eight hundred sixty-nine".