99644045 has 4 divisors (see below), whose sum is σ = 119572860. Its totient is φ = 79715232.

The previous prime is 99644033. The next prime is 99644047. The reversal of 99644045 is 54044699.

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 36457444 + 63186601 = 6038^2 + 7949^2 .

It is a cyclic number.

It is not a de Polignac number, because 99644045 - 2¹² = 99639949 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 99643993 and 99644011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99644047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9964400 + ... + 9964409.

It is an arithmetic number, because the mean of its divisors is an integer number (29893215).

Almost surely, 2^99644045 is an apocalyptic number.

It is an amenable number.

99644045 is a deficient number, since it is larger than the sum of its proper divisors (19928815).

99644045 is a wasteful number, since it uses less digits than its factorization.

99644045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19928814.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 99644045 is about 9982.1863837538. The cubic root of 99644045 is about 463.6074963619.

The spelling of 99644045 in words is "ninety-nine million, six hundred forty-four thousand, forty-five".