168799999 has 2 divisors, whose sum is σ = 168800000. Its totient is φ = 168799998.

The previous prime is 168799979. The next prime is 168800081. The reversal of 168799999 is 999997861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168799999 - 2⁹ = 168799487 is a prime.

168799999 is a modest number, since divided by 99999 gives 1687 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168799979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84399999 + 84400000.

It is an arithmetic number, because the mean of its divisors is an integer number (84400000).

Almost surely, 2^168799999 is an apocalyptic number.

168799999 is a deficient number, since it is larger than the sum of its proper divisors (1).

168799999 is an equidigital number, since it uses as much as digits as its factorization.

168799999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19840464, while the sum is 67.

The square root of 168799999 is about 12992.3053766451. The cubic root of 168799999 is about 552.6592965596.

The spelling of 168799999 in words is "one hundred sixty-eight million, seven hundred ninety-nine thousand, nine hundred ninety-nine".