99643104 has 144 divisors (see below), whose sum is σ = 314181504. Its totient is φ = 29702400.

The previous prime is 99643099. The next prime is 99643111. The reversal of 99643104 is 40134699.

99643104 is a `hidden beast` number, since 9 + 9 + 643 + 1 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224707 + ... + 225149.

It is an arithmetic number, because the mean of its divisors is an integer number (2181816).

Almost surely, 2^99643104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99643104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157090752).

99643104 is an abundant number, since it is smaller than the sum of its proper divisors (214538400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99643104 is a wasteful number, since it uses less digits than its factorization.

99643104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 99643104 is about 9982.1392496799. The cubic root of 99643104 is about 463.6060369804.

It can be divided in two parts, 996 and 43104, that added together give a square (44100 = 210²).

The spelling of 99643104 in words is "ninety-nine million, six hundred forty-three thousand, one hundred four".