68813047 has 4 divisors (see below), whose sum is σ = 70491456. Its totient is φ = 67134640.

The previous prime is 68813039. The next prime is 68813083. The reversal of 68813047 is 74031886.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74031886 = 2 ⋅37015943.

It is a cyclic number.

It is not a de Polignac number, because 68813047 - 2³ = 68813039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68812997 and 68813015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68814047) 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, 839143 + ... + 839224.

It is an arithmetic number, because the mean of its divisors is an integer number (17622864).

Almost surely, 2^68813047 is an apocalyptic number.

68813047 is a deficient number, since it is larger than the sum of its proper divisors (1678409).

68813047 is a wasteful number, since it uses less digits than its factorization.

68813047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678408.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 68813047 is about 8295.3629818110. The cubic root of 68813047 is about 409.7858230965.

The spelling of 68813047 in words is "sixty-eight million, eight hundred thirteen thousand, forty-seven".