872715811 has 4 divisors (see below), whose sum is σ = 952053624. Its totient is φ = 793378000.

The previous prime is 872715761. The next prime is 872715853. The reversal of 872715811 is 118517278.

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-872715811 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872725811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39668890 + ... + 39668911.

It is an arithmetic number, because the mean of its divisors is an integer number (238013406).

Almost surely, 2^872715811 is an apocalyptic number.

872715811 is a deficient number, since it is larger than the sum of its proper divisors (79337813).

872715811 is a wasteful number, since it uses less digits than its factorization.

872715811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79337812.

The product of its digits is 31360, while the sum is 40.

The square root of 872715811 is about 29541.7638437518. The cubic root of 872715811 is about 955.6325810849.

The spelling of 872715811 in words is "eight hundred seventy-two million, seven hundred fifteen thousand, eight hundred eleven".