99830138 has 4 divisors (see below), whose sum is σ = 149745210. Its totient is φ = 49915068.

The previous prime is 99830131. The next prime is 99830147. The reversal of 99830138 is 83103899.

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., 71453209 + 28376929 = 8453^2 + 5327^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99830095 and 99830104.

It is not an unprimeable number, because it can be changed into a prime (99830131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24957533 + ... + 24957536.

Almost surely, 2^99830138 is an apocalyptic number.

99830138 is a deficient number, since it is larger than the sum of its proper divisors (49915072).

99830138 is a wasteful number, since it uses less digits than its factorization.

99830138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49915071.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 99830138 is about 9991.5032902962. The cubic root of 99830138 is about 463.8959245619.

The spelling of 99830138 in words is "ninety-nine million, eight hundred thirty thousand, one hundred thirty-eight".