99221443 has 2 divisors, whose sum is σ = 99221444. Its totient is φ = 99221442.

The previous prime is 99221429. The next prime is 99221449. The reversal of 99221443 is 34412299.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99221443 - 2²⁵ = 65667011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99221399 and 99221408.

It is not a weakly prime, because it can be changed into another prime (99221449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49610721 + 49610722.

It is an arithmetic number, because the mean of its divisors is an integer number (49610722).

Almost surely, 2^99221443 is an apocalyptic number.

99221443 is a deficient number, since it is larger than the sum of its proper divisors (1).

99221443 is an equidigital number, since it uses as much as digits as its factorization.

99221443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 99221443 is about 9960.9960847297. The cubic root of 99221443 is about 462.9511631615.

The spelling of 99221443 in words is "ninety-nine million, two hundred twenty-one thousand, four hundred forty-three".