809968479 has 4 divisors (see below), whose sum is σ = 1079957976. Its totient is φ = 539978984.

The previous prime is 809968469. The next prime is 809968513. The reversal of 809968479 is 974869908.

809968479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 809968479 - 2⁵ = 809968447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809968469) 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, 134994744 + ... + 134994749.

It is an arithmetic number, because the mean of its divisors is an integer number (269989494).

Almost surely, 2^809968479 is an apocalyptic number.

809968479 is a deficient number, since it is larger than the sum of its proper divisors (269989497).

809968479 is a wasteful number, since it uses less digits than its factorization.

809968479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269989496.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The square root of 809968479 is about 28459.9451686049. The cubic root of 809968479 is about 932.1576598915.

The spelling of 809968479 in words is "eight hundred nine million, nine hundred sixty-eight thousand, four hundred seventy-nine".