99773321 has 2 divisors, whose sum is σ = 99773322. Its totient is φ = 99773320.

The previous prime is 99773309. The next prime is 99773329. The reversal of 99773321 is 12337799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 20830096 = 8885^2 + 4564^2 .

It is a cyclic number.

It is not a de Polignac number, because 99773321 - 2¹⁰ = 99772297 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99773329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49886660 + 49886661.

It is an arithmetic number, because the mean of its divisors is an integer number (49886661).

Almost surely, 2^99773321 is an apocalyptic number.

It is an amenable number.

99773321 is a deficient number, since it is larger than the sum of its proper divisors (1).

99773321 is an equidigital number, since it uses as much as digits as its factorization.

99773321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 41.

The square root of 99773321 is about 9988.6596197888. The cubic root of 99773321 is about 463.8079011215.

The spelling of 99773321 in words is "ninety-nine million, seven hundred seventy-three thousand, three hundred twenty-one".