68764529 has 2 divisors, whose sum is σ = 68764530. Its totient is φ = 68764528.

The previous prime is 68764519. The next prime is 68764573. The reversal of 68764529 is 92546786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 27804529 = 6400^2 + 5273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68764529 is a prime.

It is not a weakly prime, because it can be changed into another prime (68764519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34382264 + 34382265.

It is an arithmetic number, because the mean of its divisors is an integer number (34382265).

Almost surely, 2^68764529 is an apocalyptic number.

It is an amenable number.

68764529 is a deficient number, since it is larger than the sum of its proper divisors (1).

68764529 is an equidigital number, since it uses as much as digits as its factorization.

68764529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 68764529 is about 8292.4380612700. The cubic root of 68764529 is about 409.6894912525.

The spelling of 68764529 in words is "sixty-eight million, seven hundred sixty-four thousand, five hundred twenty-nine".