800404081 has 4 divisors (see below), whose sum is σ = 847486692. Its totient is φ = 753321472.

The previous prime is 800404061. The next prime is 800404181. The reversal of 800404081 is 180404008.

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

It can be written as a sum of positive squares in 2 ways, for example, as 726787681 + 73616400 = 26959^2 + 8580^2 .

It is a cyclic number.

It is not a de Polignac number, because 800404081 - 2¹³ = 800395889 is a prime.

It is a super-2 number, since 2×800404081² = 1281293385762909122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800404001) 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 in 3 ways as a sum of consecutive naturals, for example, 23541280 + ... + 23541313.

It is an arithmetic number, because the mean of its divisors is an integer number (211871673).

Almost surely, 2^800404081 is an apocalyptic number.

It is an amenable number.

800404081 is a deficient number, since it is larger than the sum of its proper divisors (47082611).

800404081 is a wasteful number, since it uses less digits than its factorization.

800404081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47082610.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 800404081 is about 28291.4135560597. The cubic root of 800404081 is about 928.4740385693.

Adding to 800404081 its reverse (180404008), we get a palindrome (980808089).

The spelling of 800404081 in words is "eight hundred million, four hundred four thousand, eighty-one".