67930341781 has 2 divisors, whose sum is σ = 67930341782. Its totient is φ = 67930341780.

The previous prime is 67930341719. The next prime is 67930341811. The reversal of 67930341781 is 18714303976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53843025681 + 14087316100 = 232041^2 + 118690^2 .

It is a cyclic number.

It is not a de Polignac number, because 67930341781 - 2⁷ = 67930341653 is a prime.

It is a super-2 number, since 2×67930341781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67934341781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33965170890 + 33965170891.

It is an arithmetic number, because the mean of its divisors is an integer number (33965170891).

Almost surely, 2^67930341781 is an apocalyptic number.

It is an amenable number.

67930341781 is a deficient number, since it is larger than the sum of its proper divisors (1).

67930341781 is an equidigital number, since it uses as much as digits as its factorization.

67930341781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 67930341781 in words is "sixty-seven billion, nine hundred thirty million, three hundred forty-one thousand, seven hundred eighty-one".