872181133 has 2 divisors, whose sum is σ = 872181134. Its totient is φ = 872181132.

The previous prime is 872181127. The next prime is 872181139. The reversal of 872181133 is 331181278.

It is a balanced prime because it is at equal distance from previous prime (872181127) and next prime (872181139).

It can be written as a sum of positive squares in only one way, i.e., 810370089 + 61811044 = 28467^2 + 7862^2 .

It is a cyclic number.

It is not a de Polignac number, because 872181133 - 2²⁹ = 335310221 is a prime.

It is a super-2 number, since 2×872181133² = 1521399857522327378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872181139) 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 as a sum of consecutive naturals, namely, 436090566 + 436090567.

It is an arithmetic number, because the mean of its divisors is an integer number (436090567).

Almost surely, 2^872181133 is an apocalyptic number.

It is an amenable number.

872181133 is a deficient number, since it is larger than the sum of its proper divisors (1).

872181133 is an equidigital number, since it uses as much as digits as its factorization.

872181133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 872181133 is about 29532.7129299020. The cubic root of 872181133 is about 955.4373819553.

The spelling of 872181133 in words is "eight hundred seventy-two million, one hundred eighty-one thousand, one hundred thirty-three".