68085021 has 8 divisors (see below), whose sum is σ = 93708544. Its totient is φ = 43925760.

The previous prime is 68085001. The next prime is 68085029. The reversal of 68085021 is 12058086.

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

It is not a de Polignac number, because 68085021 - 2⁷ = 68084893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68085021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68085029) 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 7 ways as a sum of consecutive naturals, for example, 365956 + ... + 366141.

It is an arithmetic number, because the mean of its divisors is an integer number (11713568).

Almost surely, 2^68085021 is an apocalyptic number.

It is an amenable number.

68085021 is a deficient number, since it is larger than the sum of its proper divisors (25623523).

68085021 is a wasteful number, since it uses less digits than its factorization.

68085021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732131.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 68085021 is about 8251.3647962019. The cubic root of 68085021 is about 408.3355503235.

The spelling of 68085021 in words is "sixty-eight million, eighty-five thousand, twenty-one".