99744221 has 2 divisors, whose sum is σ = 99744222. Its totient is φ = 99744220.

The previous prime is 99744209. The next prime is 99744233. The reversal of 99744221 is 12244799.

It is a balanced prime because it is at equal distance from previous prime (99744209) and next prime (99744233).

It can be written as a sum of positive squares in only one way, i.e., 99720196 + 24025 = 9986^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 99744221 - 2¹⁰ = 99743197 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99744241) 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, 49872110 + 49872111.

It is an arithmetic number, because the mean of its divisors is an integer number (49872111).

Almost surely, 2^99744221 is an apocalyptic number.

It is an amenable number.

99744221 is a deficient number, since it is larger than the sum of its proper divisors (1).

99744221 is an equidigital number, since it uses as much as digits as its factorization.

99744221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 99744221 is about 9987.2028616625. The cubic root of 99744221 is about 463.7628051574.

The spelling of 99744221 in words is "ninety-nine million, seven hundred forty-four thousand, two hundred twenty-one".