99644663 has 8 divisors (see below), whose sum is σ = 102910080. Its totient is φ = 96409440.

The previous prime is 99644647. The next prime is 99644707. The reversal of 99644663 is 36644699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99644663 - 2⁴ = 99644647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99644263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743 + ... + 14136.

It is an arithmetic number, because the mean of its divisors is an integer number (12863760).

Almost surely, 2^99644663 is an apocalyptic number.

99644663 is a deficient number, since it is larger than the sum of its proper divisors (3265417).

99644663 is a wasteful number, since it uses less digits than its factorization.

99644663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15097.

The product of its digits is 839808, while the sum is 47.

The square root of 99644663 is about 9982.2173388481. The cubic root of 99644663 is about 463.6084548030.

The spelling of 99644663 in words is "ninety-nine million, six hundred forty-four thousand, six hundred sixty-three".