805998113 has 4 divisors (see below), whose sum is σ = 806057028. Its totient is φ = 805939200.

The previous prime is 805998091. The next prime is 805998133. The reversal of 805998113 is 311899508.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 772450849 + 33547264 = 27793^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 805998113 - 2²⁸ = 537562657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (805998133) 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, 2945 + ... + 40257.

It is an arithmetic number, because the mean of its divisors is an integer number (201514257).

Almost surely, 2^805998113 is an apocalyptic number.

It is an amenable number.

805998113 is a deficient number, since it is larger than the sum of its proper divisors (58915).

805998113 is a wasteful number, since it uses less digits than its factorization.

805998113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58914.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 805998113 is about 28390.1058997673. The cubic root of 805998113 is about 930.6320569444.

The spelling of 805998113 in words is "eight hundred five million, nine hundred ninety-eight thousand, one hundred thirteen".