800916861 has 16 divisors (see below), whose sum is σ = 1140876800. Its totient is φ = 498289968.

The previous prime is 800916859. The next prime is 800916871. The reversal of 800916861 is 168619008.

It is not a de Polignac number, because 800916861 - 2¹ = 800916859 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 (800916871) 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 15 ways as a sum of consecutive naturals, for example, 101041 + ... + 108678.

It is an arithmetic number, because the mean of its divisors is an integer number (71304800).

Almost surely, 2^800916861 is an apocalyptic number.

It is an amenable number.

800916861 is a deficient number, since it is larger than the sum of its proper divisors (339959939).

800916861 is a wasteful number, since it uses less digits than its factorization.

800916861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209808.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 800916861 is about 28300.4745719926. The cubic root of 800916861 is about 928.6722723085.

The spelling of 800916861 in words is "eight hundred million, nine hundred sixteen thousand, eight hundred sixty-one".