68388999 has 16 divisors (see below), whose sum is σ = 109697280. Its totient is φ = 37022400.

The previous prime is 68388997. The next prime is 68389001. The reversal of 68388999 is 99988386.

It is an interprime number because it is at equal distance from previous prime (68388997) and next prime (68389001).

It is not a de Polignac number, because 68388999 - 2¹ = 68388997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68388997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85302 + ... + 86099.

It is an arithmetic number, because the mean of its divisors is an integer number (6856080).

Almost surely, 2^68388999 is an apocalyptic number.

68388999 is a deficient number, since it is larger than the sum of its proper divisors (41308281).

68388999 is a wasteful number, since it uses less digits than its factorization.

68388999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171430.

The product of its digits is 6718464, while the sum is 60.

The square root of 68388999 is about 8269.7641441579. The cubic root of 68388999 is about 408.9423443615.

The spelling of 68388999 in words is "sixty-eight million, three hundred eighty-eight thousand, nine hundred ninety-nine".