8721131333 has 2 divisors, whose sum is σ = 8721131334. Its totient is φ = 8721131332.

The previous prime is 8721131323. The next prime is 8721131371. The reversal of 8721131333 is 3331311278.

8721131333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5807506849 + 2913624484 = 76207^2 + 53978^2 .

It is a cyclic number.

It is not a de Polignac number, because 8721131333 - 2¹⁴ = 8721114949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8721131333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8721131323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360565666 + 4360565667.

It is an arithmetic number, because the mean of its divisors is an integer number (4360565667).

Almost surely, 2^8721131333 is an apocalyptic number.

It is an amenable number.

8721131333 is a deficient number, since it is larger than the sum of its proper divisors (1).

8721131333 is an equidigital number, since it uses as much as digits as its factorization.

8721131333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 8721131333 is about 93386.9976656279. The cubic root of 8721131333 is about 2058.3739432719.

The spelling of 8721131333 in words is "eight billion, seven hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty-three".