872541811 has 4 divisors (see below), whose sum is σ = 875647224. Its totient is φ = 869436400.

The previous prime is 872541799. The next prime is 872541863. The reversal of 872541811 is 118145278.

872541811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872541811 is a prime.

It is a super-2 number, since 2×872541811² = 1522658423886319442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872541211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1552285 + ... + 1552846.

It is an arithmetic number, because the mean of its divisors is an integer number (218911806).

Almost surely, 2^872541811 is an apocalyptic number.

872541811 is a deficient number, since it is larger than the sum of its proper divisors (3105413).

872541811 is a wasteful number, since it uses less digits than its factorization.

872541811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105412.

The product of its digits is 17920, while the sum is 37.

The square root of 872541811 is about 29538.8187136859. The cubic root of 872541811 is about 955.5690662808.

The spelling of 872541811 in words is "eight hundred seventy-two million, five hundred forty-one thousand, eight hundred eleven".