68511133 has 2 divisors, whose sum is σ = 68511134. Its totient is φ = 68511132.

The previous prime is 68511103. The next prime is 68511199. The reversal of 68511133 is 33111586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66145689 + 2365444 = 8133^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 68511133 - 2¹⁷ = 68380061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68511103) 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, 34255566 + 34255567.

It is an arithmetic number, because the mean of its divisors is an integer number (34255567).

Almost surely, 2^68511133 is an apocalyptic number.

It is an amenable number.

68511133 is a deficient number, since it is larger than the sum of its proper divisors (1).

68511133 is an equidigital number, since it uses as much as digits as its factorization.

68511133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 68511133 is about 8277.1452204247. The cubic root of 68511133 is about 409.1856391518.

It can be divided in two parts, 68511 and 133, that added together give a square (68644 = 262²).

The spelling of 68511133 in words is "sixty-eight million, five hundred eleven thousand, one hundred thirty-three".