99644449 has 2 divisors, whose sum is σ = 99644450. Its totient is φ = 99644448.

The previous prime is 99644443. The next prime is 99644507. The reversal of 99644449 is 94444699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70560000 + 29084449 = 8400^2 + 5393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99644449 is a prime.

It is not a weakly prime, because it can be changed into another prime (99644443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49822224 + 49822225.

It is an arithmetic number, because the mean of its divisors is an integer number (49822225).

Almost surely, 2^99644449 is an apocalyptic number.

It is an amenable number.

99644449 is a deficient number, since it is larger than the sum of its proper divisors (1).

99644449 is an equidigital number, since it uses as much as digits as its factorization.

99644449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The square root of 99644449 is about 9982.2066197810. The cubic root of 99644449 is about 463.6081229161.

The spelling of 99644449 in words is "ninety-nine million, six hundred forty-four thousand, four hundred forty-nine".