68540573 has 2 divisors, whose sum is σ = 68540574. Its totient is φ = 68540572.

The previous prime is 68540569. The next prime is 68540579. The reversal of 68540573 is 37504586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58415449 + 10125124 = 7643^2 + 3182^2 .

It is a cyclic number.

It is not a de Polignac number, because 68540573 - 2² = 68540569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68540579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34270286 + 34270287.

It is an arithmetic number, because the mean of its divisors is an integer number (34270287).

Almost surely, 2^68540573 is an apocalyptic number.

It is an amenable number.

68540573 is a deficient number, since it is larger than the sum of its proper divisors (1).

68540573 is an equidigital number, since it uses as much as digits as its factorization.

68540573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 68540573 is about 8278.9234203488. The cubic root of 68540573 is about 409.2442413069.

The spelling of 68540573 in words is "sixty-eight million, five hundred forty thousand, five hundred seventy-three".