68112757 has 2 divisors, whose sum is σ = 68112758. Its totient is φ = 68112756.

The previous prime is 68112703. The next prime is 68112769. The reversal of 68112757 is 75721186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50211396 + 17901361 = 7086^2 + 4231^2 .

It is a cyclic number.

It is not a de Polignac number, because 68112757 - 2¹⁵ = 68079989 is a prime.

It is a super-2 number, since 2×68112757² = 9278695332282098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68112257) 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, 34056378 + 34056379.

It is an arithmetic number, because the mean of its divisors is an integer number (34056379).

Almost surely, 2^68112757 is an apocalyptic number.

It is an amenable number.

68112757 is a deficient number, since it is larger than the sum of its proper divisors (1).

68112757 is an equidigital number, since it uses as much as digits as its factorization.

68112757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 37.

The square root of 68112757 is about 8253.0453167301. The cubic root of 68112757 is about 408.3909910900.

The spelling of 68112757 in words is "sixty-eight million, one hundred twelve thousand, seven hundred fifty-seven".