99330821 has 2 divisors, whose sum is σ = 99330822. Its totient is φ = 99330820.

The previous prime is 99330799. The next prime is 99330827. The reversal of 99330821 is 12803399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77193796 + 22137025 = 8786^2 + 4705^2 .

It is a cyclic number.

It is not a de Polignac number, because 99330821 - 2¹⁸ = 99068677 is a prime.

It is a super-2 number, since 2×99330821² = 19733224001068082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99330827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49665410 + 49665411.

It is an arithmetic number, because the mean of its divisors is an integer number (49665411).

Almost surely, 2^99330821 is an apocalyptic number.

It is an amenable number.

99330821 is a deficient number, since it is larger than the sum of its proper divisors (1).

99330821 is an equidigital number, since it uses as much as digits as its factorization.

99330821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 99330821 is about 9966.4848868596. The cubic root of 99330821 is about 463.1212140279.

The spelling of 99330821 in words is "ninety-nine million, three hundred thirty thousand, eight hundred twenty-one".