68538047 has 4 divisors (see below), whose sum is σ = 68570040. Its totient is φ = 68506056.

The previous prime is 68538037. The next prime is 68538053. The reversal of 68538047 is 74083586.

It is a happy number.

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 68538047 - 2⁴ = 68538031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68537995 and 68538013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68538007) 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, 12533 + ... + 17150.

It is an arithmetic number, because the mean of its divisors is an integer number (17142510).

Almost surely, 2^68538047 is an apocalyptic number.

68538047 is a deficient number, since it is larger than the sum of its proper divisors (31993).

68538047 is a wasteful number, since it uses less digits than its factorization.

68538047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31992.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 68538047 is about 8278.7708628757. The cubic root of 68538047 is about 409.2392138047.

The spelling of 68538047 in words is "sixty-eight million, five hundred thirty-eight thousand, forty-seven".