68347057 has 2 divisors, whose sum is σ = 68347058. Its totient is φ = 68347056.

The previous prime is 68347043. The next prime is 68347067. The reversal of 68347057 is 75074386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 53361 = 8264^2 + 231^2 .

It is a cyclic number.

It is not a de Polignac number, because 68347057 - 2¹⁵ = 68314289 is a prime.

It is a super-3 number, since 3×68347057³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (68347067) 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, 34173528 + 34173529.

It is an arithmetic number, because the mean of its divisors is an integer number (34173529).

Almost surely, 2^68347057 is an apocalyptic number.

It is an amenable number.

68347057 is a deficient number, since it is larger than the sum of its proper divisors (1).

68347057 is an equidigital number, since it uses as much as digits as its factorization.

68347057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 68347057 is about 8267.2278908955. The cubic root of 68347057 is about 408.8587277586.

The spelling of 68347057 in words is "sixty-eight million, three hundred forty-seven thousand, fifty-seven".