68529997 has 2 divisors, whose sum is σ = 68529998. Its totient is φ = 68529996.

The previous prime is 68529977. The next prime is 68530027. The reversal of 68529997 is 79992586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 22099401 = 6814^2 + 4701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68529997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68529947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34264998 + 34264999.

It is an arithmetic number, because the mean of its divisors is an integer number (34264999).

Almost surely, 2^68529997 is an apocalyptic number.

It is an amenable number.

68529997 is a deficient number, since it is larger than the sum of its proper divisors (1).

68529997 is an equidigital number, since it uses as much as digits as its factorization.

68529997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 68529997 is about 8278.2846653156. The cubic root of 68529997 is about 409.2231910514.

The spelling of 68529997 in words is "sixty-eight million, five hundred twenty-nine thousand, nine hundred ninety-seven".