68299999 has 4 divisors (see below), whose sum is σ = 72317664. Its totient is φ = 64282336.

The previous prime is 68299991. The next prime is 68300051. The reversal of 68299999 is 99999286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99999286 = 2 ⋅49999643.

It is a cyclic number.

It is not a de Polignac number, because 68299999 - 2³ = 68299991 is a prime.

It is a Duffinian number.

68299999 is a modest number, since divided by 9999 gives 6829 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68299991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2008807 + ... + 2008840.

It is an arithmetic number, because the mean of its divisors is an integer number (18079416).

Almost surely, 2^68299999 is an apocalyptic number.

68299999 is a deficient number, since it is larger than the sum of its proper divisors (4017665).

68299999 is a wasteful number, since it uses less digits than its factorization.

68299999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017664.

The product of its digits is 5668704, while the sum is 61.

The square root of 68299999 is about 8264.3813440572. The cubic root of 68299999 is about 408.7648710404.

The spelling of 68299999 in words is "sixty-eight million, two hundred ninety-nine thousand, nine hundred ninety-nine".