68099513 has 2 divisors, whose sum is σ = 68099514. Its totient is φ = 68099512.

The previous prime is 68099509. The next prime is 68099531. The reversal of 68099513 is 31599086.

Together with next prime (68099531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57942544 + 10156969 = 7612^2 + 3187^2 .

It is a cyclic number.

It is not a de Polignac number, because 68099513 - 2² = 68099509 is a prime.

It is not a weakly prime, because it can be changed into another prime (68099533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34049756 + 34049757.

It is an arithmetic number, because the mean of its divisors is an integer number (34049757).

Almost surely, 2^68099513 is an apocalyptic number.

It is an amenable number.

68099513 is a deficient number, since it is larger than the sum of its proper divisors (1).

68099513 is an equidigital number, since it uses as much as digits as its factorization.

68099513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 68099513 is about 8252.2429072344. The cubic root of 68099513 is about 408.3645198819.

The spelling of 68099513 in words is "sixty-eight million, ninety-nine thousand, five hundred thirteen".