68020717 has 2 divisors, whose sum is σ = 68020718. Its totient is φ = 68020716.

The previous prime is 68020709. The next prime is 68020739. The reversal of 68020717 is 71702086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51423241 + 16597476 = 7171^2 + 4074^2 .

It is a cyclic number.

It is not a de Polignac number, because 68020717 - 2³ = 68020709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68020217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34010358 + 34010359.

It is an arithmetic number, because the mean of its divisors is an integer number (34010359).

Almost surely, 2^68020717 is an apocalyptic number.

It is an amenable number.

68020717 is a deficient number, since it is larger than the sum of its proper divisors (1).

68020717 is an equidigital number, since it uses as much as digits as its factorization.

68020717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 68020717 is about 8247.4673082104. The cubic root of 68020717 is about 408.2069567912.

The spelling of 68020717 in words is "sixty-eight million, twenty thousand, seven hundred seventeen".