449191669 has 2 divisors, whose sum is σ = 449191670. Its totient is φ = 449191668.

The previous prime is 449191667. The next prime is 449191733. The reversal of 449191669 is 966191944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407434225 + 41757444 = 20185^2 + 6462^2 .

It is a cyclic number.

It is not a de Polignac number, because 449191669 - 2¹ = 449191667 is a prime.

It is a super-2 number, since 2×449191669² = 403546310998011122, which contains 22 as substring.

Together with 449191667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449191667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224595834 + 224595835.

It is an arithmetic number, because the mean of its divisors is an integer number (224595835).

Almost surely, 2^449191669 is an apocalyptic number.

It is an amenable number.

449191669 is a deficient number, since it is larger than the sum of its proper divisors (1).

449191669 is an equidigital number, since it uses as much as digits as its factorization.

449191669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 449191669 is about 21194.1423275395. The cubic root of 449191669 is about 765.8503191094.

The spelling of 449191669 in words is "four hundred forty-nine million, one hundred ninety-one thousand, six hundred sixty-nine".