68513089 has 2 divisors, whose sum is σ = 68513090. Its totient is φ = 68513088.

The previous prime is 68513087. The next prime is 68513099. The reversal of 68513089 is 98031586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67108864 + 1404225 = 8192^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 68513089 - 2¹ = 68513087 is a prime.

Together with 68513087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68513087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34256544 + 34256545.

It is an arithmetic number, because the mean of its divisors is an integer number (34256545).

Almost surely, 2^68513089 is an apocalyptic number.

It is an amenable number.

68513089 is a deficient number, since it is larger than the sum of its proper divisors (1).

68513089 is an equidigital number, since it uses as much as digits as its factorization.

68513089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 68513089 is about 8277.2633762615. The cubic root of 68513089 is about 409.1895332123.

The spelling of 68513089 in words is "sixty-eight million, five hundred thirteen thousand, eighty-nine".