8321500069 has 2 divisors, whose sum is σ = 8321500070. Its totient is φ = 8321500068.

The previous prime is 8321500037. The next prime is 8321500087. The reversal of 8321500069 is 9600051238.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7074492100 + 1247007969 = 84110^2 + 35313^2 .

It is a cyclic number.

It is not a de Polignac number, because 8321500069 - 2⁵ = 8321500037 is a prime.

It is a super-2 number, since 2×8321500069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8321504069) 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 as a sum of consecutive naturals, namely, 4160750034 + 4160750035.

It is an arithmetic number, because the mean of its divisors is an integer number (4160750035).

Almost surely, 2^8321500069 is an apocalyptic number.

It is an amenable number.

8321500069 is a deficient number, since it is larger than the sum of its proper divisors (1).

8321500069 is an equidigital number, since it uses as much as digits as its factorization.

8321500069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 8321500069 is about 91222.2564344908. The cubic root of 8321500069 is about 2026.4405798907.

The spelling of 8321500069 in words is "eight billion, three hundred twenty-one million, five hundred thousand, sixty-nine".