68712529 has 2 divisors, whose sum is σ = 68712530. Its totient is φ = 68712528.

The previous prime is 68712517. The next prime is 68712533. The reversal of 68712529 is 92521786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41254929 + 27457600 = 6423^2 + 5240^2 .

It is a cyclic number.

It is not a de Polignac number, because 68712529 - 2²¹ = 66615377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68712491 and 68712500.

It is not a weakly prime, because it can be changed into another prime (68712559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34356264 + 34356265.

It is an arithmetic number, because the mean of its divisors is an integer number (34356265).

Almost surely, 2^68712529 is an apocalyptic number.

It is an amenable number.

68712529 is a deficient number, since it is larger than the sum of its proper divisors (1).

68712529 is an equidigital number, since it uses as much as digits as its factorization.

68712529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 68712529 is about 8289.3020815989. The cubic root of 68712529 is about 409.5861956236.

The spelling of 68712529 in words is "sixty-eight million, seven hundred twelve thousand, five hundred twenty-nine".