99999938 has 8 divisors (see below), whose sum is σ = 151898880. Its totient is φ = 49366980.

The previous prime is 99999931. The next prime is 99999941. The reversal of 99999938 is 83999999.

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 (99999931) 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, 316298 + ... + 316613.

It is an arithmetic number, because the mean of its divisors is an integer number (18987360).

Almost surely, 2^99999938 is an apocalyptic number.

99999938 is a deficient number, since it is larger than the sum of its proper divisors (51898942).

99999938 is a wasteful number, since it uses less digits than its factorization.

99999938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632992.

The product of its digits is 12754584, while the sum is 65.

The square root of 99999938 is about 9999.9968999995. The cubic root of 99999938 is about 464.1587874351.

It can be divided in two parts, 9999993 and 8, that added together give a palindrome (10000001).

The spelling of 99999938 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred thirty-eight".