68742217 has 2 divisors, whose sum is σ = 68742218. Its totient is φ = 68742216.

The previous prime is 68742211. The next prime is 68742253. The reversal of 68742217 is 71224786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42823936 + 25918281 = 6544^2 + 5091^2 .

It is a cyclic number.

It is not a de Polignac number, because 68742217 - 2¹⁵ = 68709449 is a prime.

It is not a weakly prime, because it can be changed into another prime (68742211) 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, 34371108 + 34371109.

It is an arithmetic number, because the mean of its divisors is an integer number (34371109).

Almost surely, 2^68742217 is an apocalyptic number.

It is an amenable number.

68742217 is a deficient number, since it is larger than the sum of its proper divisors (1).

68742217 is an equidigital number, since it uses as much as digits as its factorization.

68742217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 37.

The square root of 68742217 is about 8291.0926300458. The cubic root of 68742217 is about 409.6451758625.

The spelling of 68742217 in words is "sixty-eight million, seven hundred forty-two thousand, two hundred seventeen".