8091989333 has 2 divisors, whose sum is σ = 8091989334. Its totient is φ = 8091989332.

The previous prime is 8091989267. The next prime is 8091989369. The reversal of 8091989333 is 3339891908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8038377649 + 53611684 = 89657^2 + 7322^2 .

It is a cyclic number.

It is not a de Polignac number, because 8091989333 - 2²² = 8087795029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8091989033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045994666 + 4045994667.

It is an arithmetic number, because the mean of its divisors is an integer number (4045994667).

Almost surely, 2^8091989333 is an apocalyptic number.

It is an amenable number.

8091989333 is a deficient number, since it is larger than the sum of its proper divisors (1).

8091989333 is an equidigital number, since it uses as much as digits as its factorization.

8091989333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 8091989333 is about 89955.4852857790. The cubic root of 8091989333 is about 2007.6365819460.

The spelling of 8091989333 in words is "eight billion, ninety-one million, nine hundred eighty-nine thousand, three hundred thirty-three".