809968481 has 12 divisors (see below), whose sum is σ = 944480880. Its totient is φ = 692584200.

The previous prime is 809968469. The next prime is 809968513. The reversal of 809968481 is 184869908.

It is a de Polignac number, because none of the positive numbers 2^k-809968481 is a prime.

It is a super-2 number, since 2×809968481² = 1312097880426894722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (809968421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 806 + ... + 40256.

It is an arithmetic number, because the mean of its divisors is an integer number (78706740).

Almost surely, 2^809968481 is an apocalyptic number.

It is an amenable number.

809968481 is a deficient number, since it is larger than the sum of its proper divisors (134512399).

809968481 is a wasteful number, since it uses less digits than its factorization.

809968481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39884 (or 39877 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 809968481 is about 28459.9452037420. The cubic root of 809968481 is about 932.1576606588.

The spelling of 809968481 in words is "eight hundred nine million, nine hundred sixty-eight thousand, four hundred eighty-one".