99205138 has 4 divisors (see below), whose sum is σ = 148807710. Its totient is φ = 49602568.

The previous prime is 99205111. The next prime is 99205163. The reversal of 99205138 is 83150299.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 83229129 + 15976009 = 9123^2 + 3997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99205097 and 99205106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24801283 + ... + 24801286.

Almost surely, 2^99205138 is an apocalyptic number.

99205138 is a deficient number, since it is larger than the sum of its proper divisors (49602572).

99205138 is a wasteful number, since it uses less digits than its factorization.

99205138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49602571.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 99205138 is about 9960.1776088582. The cubic root of 99205138 is about 462.9258029436.

The spelling of 99205138 in words is "ninety-nine million, two hundred five thousand, one hundred thirty-eight".