68391841 has 4 divisors (see below), whose sum is σ = 78162112. Its totient is φ = 58621572.

The previous prime is 68391839. The next prime is 68391853. The reversal of 68391841 is 14819386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68391841 - 2¹ = 68391839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68391794 and 68391803.

It is not an unprimeable number, because it can be changed into a prime (68391821) 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 3 ways as a sum of consecutive naturals, for example, 4885125 + ... + 4885138.

It is an arithmetic number, because the mean of its divisors is an integer number (19540528).

Almost surely, 2^68391841 is an apocalyptic number.

It is an amenable number.

68391841 is a deficient number, since it is larger than the sum of its proper divisors (9770271).

68391841 is an equidigital number, since it uses as much as digits as its factorization.

68391841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770270.

The product of its digits is 41472, while the sum is 40.

The square root of 68391841 is about 8269.9359731500. The cubic root of 68391841 is about 408.9480090058.

The spelling of 68391841 in words is "sixty-eight million, three hundred ninety-one thousand, eight hundred forty-one".