99643724 has 12 divisors (see below), whose sum is σ = 174999048. Its totient is φ = 49644000.

The previous prime is 99643717. The next prime is 99643729. The reversal of 99643724 is 42734699.

It is not an unprimeable number, because it can be changed into a prime (99643729) 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 3 ways as a sum of consecutive naturals, for example, 43202 + ... + 45449.

It is an arithmetic number, because the mean of its divisors is an integer number (14583254).

Almost surely, 2^99643724 is an apocalyptic number.

It is an amenable number.

99643724 is a deficient number, since it is larger than the sum of its proper divisors (75355324).

99643724 is a wasteful number, since it uses less digits than its factorization.

99643724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88936 (or 88934 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 99643724 is about 9982.1703050990. The cubic root of 99643724 is about 463.6069985293.

The spelling of 99643724 in words is "ninety-nine million, six hundred forty-three thousand, seven hundred twenty-four".