800561873 has 8 divisors (see below), whose sum is σ = 826844328. Its totient is φ = 774693504.

The previous prime is 800561869. The next prime is 800561893. The reversal of 800561873 is 378165008.

It can be written as a sum of positive squares in 4 ways, for example, as 74097664 + 726464209 = 8608^2 + 26953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 800561873 - 2² = 800561869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800561803) 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 7 ways as a sum of consecutive naturals, for example, 99590 + ... + 107327.

It is an arithmetic number, because the mean of its divisors is an integer number (103355541).

Almost surely, 2^800561873 is an apocalyptic number.

It is an amenable number.

800561873 is a deficient number, since it is larger than the sum of its proper divisors (26282455).

800561873 is a wasteful number, since it uses less digits than its factorization.

800561873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207043.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 800561873 is about 28294.2021092661. The cubic root of 800561873 is about 928.5350478156.

The spelling of 800561873 in words is "eight hundred million, five hundred sixty-one thousand, eight hundred seventy-three".