99639550 has 24 divisors (see below), whose sum is σ = 196232976. Its totient is φ = 37511040.

The previous prime is 99639541. The next prime is 99639569. The reversal of 99639550 is 5593699.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 99639550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57762 + ... + 59461.

It is an arithmetic number, because the mean of its divisors is an integer number (8176374).

Almost surely, 2^99639550 is an apocalyptic number.

99639550 is a deficient number, since it is larger than the sum of its proper divisors (96593426).

99639550 is a wasteful number, since it uses less digits than its factorization.

99639550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117252 (or 117247 counting only the distinct ones).

The product of its (nonzero) digits is 328050, while the sum is 46.

The square root of 99639550 is about 9981.9612301391. The cubic root of 99639550 is about 463.6005250571.

The spelling of 99639550 in words is "ninety-nine million, six hundred thirty-nine thousand, five hundred fifty".