872341805 has 4 divisors (see below), whose sum is σ = 1046810172. Its totient is φ = 697873440.

The previous prime is 872341793. The next prime is 872341843. The reversal of 872341805 is 508143278.

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 182439049 + 689902756 = 13507^2 + 26266^2 .

It is not a de Polignac number, because 872341805 - 2⁸ = 872341549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 87234176 + ... + 87234185.

It is an arithmetic number, because the mean of its divisors is an integer number (261702543).

Almost surely, 2^872341805 is an apocalyptic number.

It is an amenable number.

872341805 is a deficient number, since it is larger than the sum of its proper divisors (174468367).

872341805 is a wasteful number, since it uses less digits than its factorization.

872341805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174468366.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 872341805 is about 29535.4330423646. The cubic root of 872341805 is about 955.4960481366.

The spelling of 872341805 in words is "eight hundred seventy-two million, three hundred forty-one thousand, eight hundred five".