99999968 has 12 divisors (see below), whose sum is σ = 196875000.
Its totient is φ = 49999968.
The previous prime is 99999959. The next prime is 99999971. The reversal of 99999968 is 86999999.
It is a junction number, because it is equal to n+sod(n) for n = 99999898 and 99999907.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1562468 + ... + 1562531.
It is an arithmetic number, because the mean of its divisors is an integer number (16406250).
Almost surely, 299999968 is an apocalyptic number.
It is an amenable number.
99999968 is a deficient number, since it is larger than the sum of its proper divisors (96875032).
99999968 is a wasteful number, since it uses less digits than its factorization.
99999968 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3125009 (or 3125001 counting only the distinct ones).
The product of its digits is 25509168, while the sum is 68.
The square root of 99999968 is about 9999.9983999999.
The cubic root of 99999968 is about 464.1588338510.
The spelling of 99999968 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-eight".