68675993 has 2 divisors, whose sum is σ = 68675994. Its totient is φ = 68675992.

The previous prime is 68675989. The next prime is 68676011. The reversal of 68675993 is 39957686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46895104 + 21780889 = 6848^2 + 4667^2 .

It is a cyclic number.

It is not a de Polignac number, because 68675993 - 2² = 68675989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68674993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34337996 + 34337997.

It is an arithmetic number, because the mean of its divisors is an integer number (34337997).

Almost surely, 2^68675993 is an apocalyptic number.

It is an amenable number.

68675993 is a deficient number, since it is larger than the sum of its proper divisors (1).

68675993 is an equidigital number, since it uses as much as digits as its factorization.

68675993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 68675993 is about 8287.0979842162. The cubic root of 68675993 is about 409.5135873497.

The spelling of 68675993 in words is "sixty-eight million, six hundred seventy-five thousand, nine hundred ninety-three".