68426821 has 8 divisors (see below), whose sum is σ = 69711840. Its totient is φ = 67153968.

The previous prime is 68426791. The next prime is 68426833. The reversal of 68426821 is 12862486.

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 68426821 - 2⁷ = 68426693 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 (68426521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8730 + ... + 14596.

It is an arithmetic number, because the mean of its divisors is an integer number (8713980).

Almost surely, 2^68426821 is an apocalyptic number.

It is an amenable number.

68426821 is a deficient number, since it is larger than the sum of its proper divisors (1285019).

68426821 is a wasteful number, since it uses less digits than its factorization.

68426821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6083.

The product of its digits is 36864, while the sum is 37.

The square root of 68426821 is about 8272.0505922051. The cubic root of 68426821 is about 409.0177179214.

The spelling of 68426821 in words is "sixty-eight million, four hundred twenty-six thousand, eight hundred twenty-one".