809449249 has 8 divisors (see below), whose sum is σ = 934244928. Its totient is φ = 686943600.

The previous prime is 809449219. The next prime is 809449253. The reversal of 809449249 is 942944908.

809449249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 809449249 - 2⁵ = 809449217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809449219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571747 + ... + 573160.

It is an arithmetic number, because the mean of its divisors is an integer number (116780616).

Almost surely, 2^809449249 is an apocalyptic number.

It is an amenable number.

809449249 is a deficient number, since it is larger than the sum of its proper divisors (124795679).

809449249 is a wasteful number, since it uses less digits than its factorization.

809449249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145015.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 809449249 is about 28450.8215874340. The cubic root of 809449249 is about 931.9584308702.

The spelling of 809449249 in words is "eight hundred nine million, four hundred forty-nine thousand, two hundred forty-nine".