99521803 has 2 divisors, whose sum is σ = 99521804. Its totient is φ = 99521802.

The previous prime is 99521789. The next prime is 99521827. The reversal of 99521803 is 30812599.

It is a weak prime.

It is an emirp because it is prime and its reverse (30812599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99521803 - 2⁹ = 99521291 is a prime.

It is not a weakly prime, because it can be changed into another prime (99521843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49760901 + 49760902.

It is an arithmetic number, because the mean of its divisors is an integer number (49760902).

Almost surely, 2^99521803 is an apocalyptic number.

99521803 is a deficient number, since it is larger than the sum of its proper divisors (1).

99521803 is an equidigital number, since it uses as much as digits as its factorization.

99521803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 99521803 is about 9976.0614974047. The cubic root of 99521803 is about 463.4178362629.

The spelling of 99521803 in words is "ninety-nine million, five hundred twenty-one thousand, eight hundred three".