68385481 has 4 divisors (see below), whose sum is σ = 69251200. Its totient is φ = 67519764.

The previous prime is 68385469. The next prime is 68385491. The reversal of 68385481 is 18458386.

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 a de Polignac number, because none of the positive numbers 2^k-68385481 is a prime.

It is a super-2 number, since 2×68385481² = 9353148023202722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68385431) 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 3 ways as a sum of consecutive naturals, for example, 432741 + ... + 432898.

It is an arithmetic number, because the mean of its divisors is an integer number (17312800).

Almost surely, 2^68385481 is an apocalyptic number.

It is an amenable number.

68385481 is a deficient number, since it is larger than the sum of its proper divisors (865719).

68385481 is an equidigital number, since it uses as much as digits as its factorization.

68385481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865718.

The product of its digits is 184320, while the sum is 43.

The square root of 68385481 is about 8269.5514388629. The cubic root of 68385481 is about 408.9353321039.

The spelling of 68385481 in words is "sixty-eight million, three hundred eighty-five thousand, four hundred eighty-one".