809549427 has 4 divisors (see below), whose sum is σ = 1079399240. Its totient is φ = 539699616.

The previous prime is 809549417. The next prime is 809549449. The reversal of 809549427 is 724945908.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 809549427 - 2¹¹ = 809547379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809549417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134924902 + ... + 134924907.

It is an arithmetic number, because the mean of its divisors is an integer number (269849810).

Almost surely, 2^809549427 is an apocalyptic number.

809549427 is a deficient number, since it is larger than the sum of its proper divisors (269849813).

809549427 is a wasteful number, since it uses less digits than its factorization.

809549427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269849812.

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

The square root of 809549427 is about 28452.5820796637. The cubic root of 809549427 is about 931.9968758913.

The spelling of 809549427 in words is "eight hundred nine million, five hundred forty-nine thousand, four hundred twenty-seven".