68307529 has 2 divisors, whose sum is σ = 68307530. Its totient is φ = 68307528.

The previous prime is 68307511. The next prime is 68307559. The reversal of 68307529 is 92570386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 28869129 = 6280^2 + 5373^2 .

It is a cyclic number.

It is not a de Polignac number, because 68307529 - 2²¹ = 66210377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68307491 and 68307500.

It is not a weakly prime, because it can be changed into another prime (68307559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34153764 + 34153765.

It is an arithmetic number, because the mean of its divisors is an integer number (34153765).

Almost surely, 2^68307529 is an apocalyptic number.

It is an amenable number.

68307529 is a deficient number, since it is larger than the sum of its proper divisors (1).

68307529 is an equidigital number, since it uses as much as digits as its factorization.

68307529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 68307529 is about 8264.8369009921. The cubic root of 68307529 is about 408.7798924480.

The spelling of 68307529 in words is "sixty-eight million, three hundred seven thousand, five hundred twenty-nine".