68368757 has 2 divisors, whose sum is σ = 68368758. Its totient is φ = 68368756.

The previous prime is 68368681. The next prime is 68368759. The reversal of 68368757 is 75786386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37075921 + 31292836 = 6089^2 + 5594^2 .

It is a cyclic number.

It is not a de Polignac number, because 68368757 - 2¹⁸ = 68106613 is a prime.

Together with 68368759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68368759) 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, 34184378 + 34184379.

It is an arithmetic number, because the mean of its divisors is an integer number (34184379).

Almost surely, 2^68368757 is an apocalyptic number.

It is an amenable number.

68368757 is a deficient number, since it is larger than the sum of its proper divisors (1).

68368757 is an equidigital number, since it uses as much as digits as its factorization.

68368757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 68368757 is about 8268.5401976407. The cubic root of 68368757 is about 408.9019936819.

The spelling of 68368757 in words is "sixty-eight million, three hundred sixty-eight thousand, seven hundred fifty-seven".