809081043 has 4 divisors (see below), whose sum is σ = 1078774728. Its totient is φ = 539387360.

The previous prime is 809081029. The next prime is 809081081. The reversal of 809081043 is 340180908.

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 809081043 - 2⁸ = 809080787 is a prime.

It is a super-2 number, since 2×809081043² = 1309224268283935698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 809080995 and 809081013.

It is not an unprimeable number, because it can be changed into a prime (809081443) 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, 134846838 + ... + 134846843.

It is an arithmetic number, because the mean of its divisors is an integer number (269693682).

Almost surely, 2^809081043 is an apocalyptic number.

809081043 is a deficient number, since it is larger than the sum of its proper divisors (269693685).

809081043 is a wasteful number, since it uses less digits than its factorization.

809081043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269693684.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 809081043 is about 28444.3499310496. The cubic root of 809081043 is about 931.8170982579.

The spelling of 809081043 in words is "eight hundred nine million, eighty-one thousand, forty-three".