68716013 has 2 divisors, whose sum is σ = 68716014. Its totient is φ = 68716012.

The previous prime is 68716009. The next prime is 68716033. The reversal of 68716013 is 31061786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47306884 + 21409129 = 6878^2 + 4627^2 .

It is a cyclic number.

It is not a de Polignac number, because 68716013 - 2² = 68716009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68716003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34358006 + 34358007.

It is an arithmetic number, because the mean of its divisors is an integer number (34358007).

Almost surely, 2^68716013 is an apocalyptic number.

It is an amenable number.

68716013 is a deficient number, since it is larger than the sum of its proper divisors (1).

68716013 is an equidigital number, since it uses as much as digits as its factorization.

68716013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 68716013 is about 8289.5122293172. The cubic root of 68716013 is about 409.5931180592.

Adding to 68716013 its reverse (31061786), we get a palindrome (99777799).

The spelling of 68716013 in words is "sixty-eight million, seven hundred sixteen thousand, thirteen".