68671573 has 2 divisors, whose sum is σ = 68671574. Its totient is φ = 68671572.

The previous prime is 68671553. The next prime is 68671579. The reversal of 68671573 is 37517686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52171729 + 16499844 = 7223^2 + 4062^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68671573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68671579) 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, 34335786 + 34335787.

It is an arithmetic number, because the mean of its divisors is an integer number (34335787).

Almost surely, 2^68671573 is an apocalyptic number.

It is an amenable number.

68671573 is a deficient number, since it is larger than the sum of its proper divisors (1).

68671573 is an equidigital number, since it uses as much as digits as its factorization.

68671573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 68671573 is about 8286.8313003222. The cubic root of 68671573 is about 409.5048017037.

The spelling of 68671573 in words is "sixty-eight million, six hundred seventy-one thousand, five hundred seventy-three".