68642017 has 2 divisors, whose sum is σ = 68642018. Its totient is φ = 68642016.

The previous prime is 68642009. The next prime is 68642023. The reversal of 68642017 is 71024686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60824401 + 7817616 = 7799^2 + 2796^2 .

It is a cyclic number.

It is not a de Polignac number, because 68642017 - 2³ = 68642009 is a prime.

It is not a weakly prime, because it can be changed into another prime (68642027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34321008 + 34321009.

It is an arithmetic number, because the mean of its divisors is an integer number (34321009).

Almost surely, 2^68642017 is an apocalyptic number.

It is an amenable number.

68642017 is a deficient number, since it is larger than the sum of its proper divisors (1).

68642017 is an equidigital number, since it uses as much as digits as its factorization.

68642017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 68642017 is about 8285.0477970860. The cubic root of 68642017 is about 409.4460434713.

The spelling of 68642017 in words is "sixty-eight million, six hundred forty-two thousand, seventeen".