68137903 has 2 divisors, whose sum is σ = 68137904. Its totient is φ = 68137902.

The previous prime is 68137879. The next prime is 68137931. The reversal of 68137903 is 30973186.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68137903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68137963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34068951 + 34068952.

It is an arithmetic number, because the mean of its divisors is an integer number (34068952).

Almost surely, 2^68137903 is an apocalyptic number.

68137903 is a deficient number, since it is larger than the sum of its proper divisors (1).

68137903 is an equidigital number, since it uses as much as digits as its factorization.

68137903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 68137903 is about 8254.5686138041. The cubic root of 68137903 is about 408.4412417665.

The spelling of 68137903 in words is "sixty-eight million, one hundred thirty-seven thousand, nine hundred three".