68715847 has 4 divisors (see below), whose sum is σ = 68756800. Its totient is φ = 68674896.

The previous prime is 68715733. The next prime is 68715869. The reversal of 68715847 is 74851786.

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

It is a cyclic number.

It is not a de Polignac number, because 68715847 - 2¹⁵ = 68683079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68715797 and 68715806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68710847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17847 + ... + 21352.

It is an arithmetic number, because the mean of its divisors is an integer number (17189200).

Almost surely, 2^68715847 is an apocalyptic number.

68715847 is a deficient number, since it is larger than the sum of its proper divisors (40953).

68715847 is a wasteful number, since it uses less digits than its factorization.

68715847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40952.

The product of its digits is 376320, while the sum is 46.

The square root of 68715847 is about 8289.5022166593. The cubic root of 68715847 is about 409.5927882355.

The spelling of 68715847 in words is "sixty-eight million, seven hundred fifteen thousand, eight hundred forty-seven".