99321331 has 2 divisors, whose sum is σ = 99321332. Its totient is φ = 99321330.

The previous prime is 99321329. The next prime is 99321347. The reversal of 99321331 is 13312399.

It is a weak prime.

It is an emirp because it is prime and its reverse (13312399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99321331 - 2¹ = 99321329 is a prime.

It is a super-3 number, since 3×99321331³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 99321329, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5724508 and since 99321331 and 5724508 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 99321293 and 99321302.

It is not a weakly prime, because it can be changed into another prime (99321031) 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, 49660665 + 49660666.

It is an arithmetic number, because the mean of its divisors is an integer number (49660666).

Almost surely, 2^99321331 is an apocalyptic number.

99321331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99321331 is an equidigital number, since it uses as much as digits as its factorization.

99321331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 31.

The square root of 99321331 is about 9966.0087798476. The cubic root of 99321331 is about 463.1064647949.

The spelling of 99321331 in words is "ninety-nine million, three hundred twenty-one thousand, three hundred thirty-one".