99644441 has 16 divisors (see below), whose sum is σ = 115014144. Its totient is φ = 85593024.

The previous prime is 99644437. The next prime is 99644443. The reversal of 99644441 is 14444699.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99644441 - 2² = 99644437 is a prime.

It is a super-3 number, since 3×99644441³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99644443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6560 + ... + 15566.

It is an arithmetic number, because the mean of its divisors is an integer number (7188384).

Almost surely, 2^99644441 is an apocalyptic number.

It is an amenable number.

99644441 is a deficient number, since it is larger than the sum of its proper divisors (15369703).

99644441 is a wasteful number, since it uses less digits than its factorization.

99644441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080.

The product of its digits is 124416, while the sum is 41.

The square root of 99644441 is about 9982.2062190680. The cubic root of 99644441 is about 463.6081105091.

The spelling of 99644441 in words is "ninety-nine million, six hundred forty-four thousand, four hundred forty-one".