809574249 has 48 divisors (see below), whose sum is σ = 1263824640. Its totient is φ = 455889600.

The previous prime is 809574239. The next prime is 809574317. The reversal of 809574249 is 942475908.

It is not a de Polignac number, because 809574249 - 2¹³ = 809566057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809574198 and 809574207.

It is not an unprimeable number, because it can be changed into a prime (809574209) 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 in 47 ways as a sum of consecutive naturals, for example, 2332894 + ... + 2333240.

It is an arithmetic number, because the mean of its divisors is an integer number (26329680).

Almost surely, 2^809574249 is an apocalyptic number.

It is an amenable number.

809574249 is a deficient number, since it is larger than the sum of its proper divisors (454250391).

809574249 is a wasteful number, since it uses less digits than its factorization.

809574249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 809574249 is about 28453.0182757471. The cubic root of 809574249 is about 932.0064012681.

The spelling of 809574249 in words is "eight hundred nine million, five hundred seventy-four thousand, two hundred forty-nine".