68750047 has 4 divisors (see below), whose sum is σ = 68767096. Its totient is φ = 68733000.

The previous prime is 68750029. The next prime is 68750051. The reversal of 68750047 is 74005786.

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: 74005786 = 2 ⋅37002893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68750047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68749988 and 68750015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68750147) 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, 1297 + ... + 11797.

It is an arithmetic number, because the mean of its divisors is an integer number (17191774).

Almost surely, 2^68750047 is an apocalyptic number.

68750047 is a deficient number, since it is larger than the sum of its proper divisors (17049).

68750047 is a wasteful number, since it uses less digits than its factorization.

68750047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17048.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 68750047 is about 8291.5648100947. The cubic root of 68750047 is about 409.6607286533.

The spelling of 68750047 in words is "sixty-eight million, seven hundred fifty thousand, forty-seven".