99644305 has 4 divisors (see below), whose sum is σ = 119573172. Its totient is φ = 79715440.

The previous prime is 99644291. The next prime is 99644329. The reversal of 99644305 is 50344699.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56911936 + 42732369 = 7544^2 + 6537^2 .

It is not a de Polignac number, because 99644305 - 2⁷ = 99644177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9964426 + ... + 9964435.

It is an arithmetic number, because the mean of its divisors is an integer number (29893293).

Almost surely, 2^99644305 is an apocalyptic number.

It is an amenable number.

99644305 is a deficient number, since it is larger than the sum of its proper divisors (19928867).

99644305 is a wasteful number, since it uses less digits than its factorization.

99644305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19928866.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 99644305 is about 9982.1994069443. The cubic root of 99644305 is about 463.6078995900.

The spelling of 99644305 in words is "ninety-nine million, six hundred forty-four thousand, three hundred five".