68009791 has 4 divisors (see below), whose sum is σ = 68228784. Its totient is φ = 67790800.

The previous prime is 68009779. The next prime is 68009801. The reversal of 68009791 is 19790086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19790086 = 2 ⋅9895043.

It is a cyclic number.

It is not a de Polignac number, because 68009791 - 2¹¹ = 68007743 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 (68009701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109030 + ... + 109651.

It is an arithmetic number, because the mean of its divisors is an integer number (17057196).

Almost surely, 2^68009791 is an apocalyptic number.

68009791 is a deficient number, since it is larger than the sum of its proper divisors (218993).

68009791 is a wasteful number, since it uses less digits than its factorization.

68009791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218992.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 68009791 is about 8246.8048964432. The cubic root of 68009791 is about 408.1850991953.

The spelling of 68009791 in words is "sixty-eight million, nine thousand, seven hundred ninety-one".