68525321 has 2 divisors, whose sum is σ = 68525322. Its totient is φ = 68525320.

The previous prime is 68525299. The next prime is 68525323. The reversal of 68525321 is 12352586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36772096 + 31753225 = 6064^2 + 5635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68525321 is a prime.

It is a Sophie Germain prime.

Together with 68525323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68525323) 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, 34262660 + 34262661.

It is an arithmetic number, because the mean of its divisors is an integer number (34262661).

Almost surely, 2^68525321 is an apocalyptic number.

It is an amenable number.

68525321 is a deficient number, since it is larger than the sum of its proper divisors (1).

68525321 is an equidigital number, since it uses as much as digits as its factorization.

68525321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 68525321 is about 8278.0022348390. The cubic root of 68525321 is about 409.2138833455.

The spelling of 68525321 in words is "sixty-eight million, five hundred twenty-five thousand, three hundred twenty-one".