68137047 has 12 divisors (see below), whose sum is σ = 107367624. Its totient is φ = 41295120.

The previous prime is 68137033. The next prime is 68137049. The reversal of 68137047 is 74073186.

It is not a de Polignac number, because 68137047 - 2⁴ = 68137031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68137049) 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 11 ways as a sum of consecutive naturals, for example, 344028 + ... + 344225.

It is an arithmetic number, because the mean of its divisors is an integer number (8947302).

Almost surely, 2^68137047 is an apocalyptic number.

68137047 is a deficient number, since it is larger than the sum of its proper divisors (39230577).

68137047 is a wasteful number, since it uses less digits than its factorization.

68137047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688270 (or 688267 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 68137047 is about 8254.5167635665. The cubic root of 68137047 is about 408.4395313765.

The spelling of 68137047 in words is "sixty-eight million, one hundred thirty-seven thousand, forty-seven".