68135237 has 2 divisors, whose sum is σ = 68135238. Its totient is φ = 68135236.

The previous prime is 68135233. The next prime is 68135257. The reversal of 68135237 is 73253186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48011041 + 20124196 = 6929^2 + 4486^2 .

It is a cyclic number.

It is not a de Polignac number, because 68135237 - 2² = 68135233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68135197 and 68135206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68135233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34067618 + 34067619.

It is an arithmetic number, because the mean of its divisors is an integer number (34067619).

Almost surely, 2^68135237 is an apocalyptic number.

It is an amenable number.

68135237 is a deficient number, since it is larger than the sum of its proper divisors (1).

68135237 is an equidigital number, since it uses as much as digits as its factorization.

68135237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 68135237 is about 8254.4071258934. The cubic root of 68135237 is about 408.4359147336.

The spelling of 68135237 in words is "sixty-eight million, one hundred thirty-five thousand, two hundred thirty-seven".