99643136 has 18 divisors (see below), whose sum is σ = 198897552. Its totient is φ = 49821440.

The previous prime is 99643121. The next prime is 99643139. The reversal of 99643136 is 63134699.

It is a junction number, because it is equal to n+sod(n) for n = 99643093 and 99643102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99643139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194360 + ... + 194871.

It is an arithmetic number, because the mean of its divisors is an integer number (11049864).

Almost surely, 2^99643136 is an apocalyptic number.

It is an amenable number.

99643136 is a deficient number, since it is larger than the sum of its proper divisors (99254416).

99643136 is an equidigital number, since it uses as much as digits as its factorization.

99643136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389247 (or 389233 counting only the distinct ones).

The product of its digits is 104976, while the sum is 41.

The square root of 99643136 is about 9982.1408525426. The cubic root of 99643136 is about 463.6060866088.

The spelling of 99643136 in words is "ninety-nine million, six hundred forty-three thousand, one hundred thirty-six".