68404071 has 4 divisors (see below), whose sum is σ = 91205432. Its totient is φ = 45602712.

The previous prime is 68404067. The next prime is 68404117. The reversal of 68404071 is 17040486.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68404071 - 2² = 68404067 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 (68404471) 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, 11400676 + ... + 11400681.

It is an arithmetic number, because the mean of its divisors is an integer number (22801358).

Almost surely, 2^68404071 is an apocalyptic number.

68404071 is a deficient number, since it is larger than the sum of its proper divisors (22801361).

68404071 is a wasteful number, since it uses less digits than its factorization.

68404071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22801360.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 68404071 is about 8270.6753654100. The cubic root of 68404071 is about 408.9723839214.

The spelling of 68404071 in words is "sixty-eight million, four hundred four thousand, seventy-one".