800008861 has 4 divisors (see below), whose sum is σ = 802301500. Its totient is φ = 797716224.

The previous prime is 800008849. The next prime is 800008873. The reversal of 800008861 is 168800008.

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

It is an interprime number because it is at equal distance from previous prime (800008849) and next prime (800008873).

It can be written as a sum of positive squares in 2 ways, for example, as 700607961 + 99400900 = 26469^2 + 9970^2 .

It is a cyclic number.

It is not a de Polignac number, because 800008861 - 2⁵ = 800008829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800008841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145796 + ... + 1146493.

It is an arithmetic number, because the mean of its divisors is an integer number (200575375).

Almost surely, 2^800008861 is an apocalyptic number.

It is an amenable number.

800008861 is a deficient number, since it is larger than the sum of its proper divisors (2292639).

800008861 is a wasteful number, since it uses less digits than its factorization.

800008861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292638.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 800008861 is about 28284.4278888579. The cubic root of 800008861 is about 928.3211941365.

Adding to 800008861 its reverse (168800008), we get a palindrome (968808869).

The spelling of 800008861 in words is "eight hundred million, eight thousand, eight hundred sixty-one".