841805081 has 4 divisors (see below), whose sum is σ = 906559332. Its totient is φ = 777050832.

The previous prime is 841805053. The next prime is 841805123. The reversal of 841805081 is 180508148.

841805081 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 can be written as a sum of positive squares in 2 ways, for example, as 525143056 + 316662025 = 22916^2 + 17795^2 .

It is a cyclic number.

It is not a de Polignac number, because 841805081 - 2⁶ = 841805017 is a prime.

It is a super-2 number, since 2×841805081² = 1417271588794833122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (841805021) 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, 32377106 + ... + 32377131.

It is an arithmetic number, because the mean of its divisors is an integer number (226639833).

Almost surely, 2^841805081 is an apocalyptic number.

It is an amenable number.

841805081 is a deficient number, since it is larger than the sum of its proper divisors (64754251).

841805081 is a wasteful number, since it uses less digits than its factorization.

841805081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64754250.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 841805081 is about 29013.8773865197. The cubic root of 841805081 is about 944.2141712332.

The spelling of 841805081 in words is "eight hundred forty-one million, eight hundred five thousand, eighty-one".