872727561 has 8 divisors (see below), whose sum is σ = 1292929760. Its totient is φ = 581818356.

The previous prime is 872727553. The next prime is 872727601. The reversal of 872727561 is 165727278.

872727561 is a `hidden beast` number, since 87 + 2 + 7 + 2 + 7 + 561 = 666.

It is not a de Polignac number, because 872727561 - 2³ = 872727553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872737561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16161595 + ... + 16161648.

It is an arithmetic number, because the mean of its divisors is an integer number (161616220).

Almost surely, 2^872727561 is an apocalyptic number.

It is an amenable number.

872727561 is a deficient number, since it is larger than the sum of its proper divisors (420202199).

872727561 is a wasteful number, since it uses less digits than its factorization.

872727561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32323252 (or 32323246 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 872727561 is about 29541.9627140784. The cubic root of 872727561 is about 955.6368698550.

The spelling of 872727561 in words is "eight hundred seventy-two million, seven hundred twenty-seven thousand, five hundred sixty-one".