68728997 has 8 divisors (see below), whose sum is σ = 70607040. Its totient is φ = 66860640.

The previous prime is 68728987. The next prime is 68729021. The reversal of 68728997 is 79982786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68728997 - 2⁴ = 68728981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68728937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13328 + ... + 17750.

It is an arithmetic number, because the mean of its divisors is an integer number (8825880).

Almost surely, 2^68728997 is an apocalyptic number.

It is an amenable number.

68728997 is a deficient number, since it is larger than the sum of its proper divisors (1878043).

68728997 is a wasteful number, since it uses less digits than its factorization.

68728997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4843.

The product of its digits is 3048192, while the sum is 56.

The square root of 68728997 is about 8290.2953505891. The cubic root of 68728997 is about 409.6189141917.

The spelling of 68728997 in words is "sixty-eight million, seven hundred twenty-eight thousand, nine hundred ninety-seven".