99644443 has 2 divisors, whose sum is σ = 99644444. Its totient is φ = 99644442.

The previous prime is 99644437. The next prime is 99644449. The reversal of 99644443 is 34444699.

It is a balanced prime because it is at equal distance from previous prime (99644437) and next prime (99644449).

It is a cyclic number.

It is not a de Polignac number, because 99644443 - 2⁹ = 99643931 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99644443.

It is not a weakly prime, because it can be changed into another prime (99644449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49822221 + 49822222.

It is an arithmetic number, because the mean of its divisors is an integer number (49822222).

Almost surely, 2^99644443 is an apocalyptic number.

99644443 is a deficient number, since it is larger than the sum of its proper divisors (1).

99644443 is an equidigital number, since it uses as much as digits as its factorization.

99644443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 43.

The square root of 99644443 is about 9982.2063192463. The cubic root of 99644443 is about 463.6081136108.

The spelling of 99644443 in words is "ninety-nine million, six hundred forty-four thousand, four hundred forty-three".