99789938 has 8 divisors (see below), whose sum is σ = 157563120. Its totient is φ = 47268900.

The previous prime is 99789931. The next prime is 99789947. The reversal of 99789938 is 83998799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (99789931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312988 + ... + 1313063.

It is an arithmetic number, because the mean of its divisors is an integer number (19695390).

Almost surely, 2^99789938 is an apocalyptic number.

99789938 is a deficient number, since it is larger than the sum of its proper divisors (57773182).

99789938 is a wasteful number, since it uses less digits than its factorization.

99789938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626072.

The product of its digits is 8817984, while the sum is 62.

The square root of 99789938 is about 9989.4913784436. The cubic root of 99789938 is about 463.8336483786.

The spelling of 99789938 in words is "ninety-nine million, seven hundred eighty-nine thousand, nine hundred thirty-eight".