99605321 has 2 divisors, whose sum is σ = 99605322. Its totient is φ = 99605320.

The previous prime is 99605299. The next prime is 99605327. The reversal of 99605321 is 12350699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97614400 + 1990921 = 9880^2 + 1411^2 .

It is an emirp because it is prime and its reverse (12350699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99605321 - 2⁶ = 99605257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99605327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49802660 + 49802661.

It is an arithmetic number, because the mean of its divisors is an integer number (49802661).

Almost surely, 2^99605321 is an apocalyptic number.

It is an amenable number.

99605321 is a deficient number, since it is larger than the sum of its proper divisors (1).

99605321 is an equidigital number, since it uses as much as digits as its factorization.

99605321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 99605321 is about 9980.2465400410. The cubic root of 99605321 is about 463.5474323517.

The spelling of 99605321 in words is "ninety-nine million, six hundred five thousand, three hundred twenty-one".