68508733 has 2 divisors, whose sum is σ = 68508734. Its totient is φ = 68508732.

The previous prime is 68508731. The next prime is 68508763. The reversal of 68508733 is 33780586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68508729 + 4 = 8277^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 68508733 - 2¹ = 68508731 is a prime.

Together with 68508731, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68508731) 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, 34254366 + 34254367.

It is an arithmetic number, because the mean of its divisors is an integer number (34254367).

Almost surely, 2^68508733 is an apocalyptic number.

It is an amenable number.

68508733 is a deficient number, since it is larger than the sum of its proper divisors (1).

68508733 is an equidigital number, since it uses as much as digits as its factorization.

68508733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 68508733 is about 8277.0002416334. Note that the first 3 decimals coincide. The cubic root of 68508733 is about 409.1808610622.

The spelling of 68508733 in words is "sixty-eight million, five hundred eight thousand, seven hundred thirty-three".