803509081 has 2 divisors, whose sum is σ = 803509082. Its totient is φ = 803509080.

The previous prime is 803509073. The next prime is 803509129. The reversal of 803509081 is 180905308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 468289600 + 335219481 = 21640^2 + 18309^2 .

It is a cyclic number.

It is not a de Polignac number, because 803509081 - 2³ = 803509073 is a prime.

It is a super-2 number, since 2×803509081² = 1291253686498929122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (803509381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401754540 + 401754541.

It is an arithmetic number, because the mean of its divisors is an integer number (401754541).

Almost surely, 2^803509081 is an apocalyptic number.

It is an amenable number.

803509081 is a deficient number, since it is larger than the sum of its proper divisors (1).

803509081 is an equidigital number, since it uses as much as digits as its factorization.

803509081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 803509081 is about 28346.2357465678. The cubic root of 803509081 is about 929.6730962649.

The spelling of 803509081 in words is "eight hundred three million, five hundred nine thousand, eighty-one".