99999994 has 8 divisors (see below), whose sum is σ = 150130548.
Its totient is φ = 49956480.
The previous prime is 99999989. The next prime is 100000007. The reversal of 99999994 is 49999999.
It can be written as a sum of positive squares in 2 ways, for example, as 83083225 + 16916769 = 9115^2 + 4113^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is a nialpdrome in base 10.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18807 + ... + 23530.
Almost surely, 299999994 is an apocalyptic number.
99999994 is a deficient number, since it is larger than the sum of its proper divisors (50130554).
99999994 is a wasteful number, since it uses less digits than its factorization.
99999994 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 43520.
The product of its digits is 19131876, while the sum is 67.
The square root of 99999994 is about 9999.9997000000.
Note that the first 3 decimals coincide.
The cubic root of 99999994 is about 464.1588740781.
The spelling of 99999994 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-four".