67930381817 has 2 divisors, whose sum is σ = 67930381818. Its totient is φ = 67930381816.

The previous prime is 67930381763. The next prime is 67930381853. The reversal of 67930381817 is 71818303976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44370894736 + 23559487081 = 210644^2 + 153491^2 .

It is a cyclic number.

It is not a de Polignac number, because 67930381817 - 2¹⁶ = 67930316281 is a prime.

It is a super-2 number, since 2×67930381817² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67930381117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33965190908 + 33965190909.

It is an arithmetic number, because the mean of its divisors is an integer number (33965190909).

Almost surely, 2^67930381817 is an apocalyptic number.

It is an amenable number.

67930381817 is a deficient number, since it is larger than the sum of its proper divisors (1).

67930381817 is an equidigital number, since it uses as much as digits as its factorization.

67930381817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 67930381817 in words is "sixty-seven billion, nine hundred thirty million, three hundred eighty-one thousand, eight hundred seventeen".