67919656969 has 2 divisors, whose sum is σ = 67919656970. Its totient is φ = 67919656968.

The previous prime is 67919656921. The next prime is 67919657009. The reversal of 67919656969 is 96965691976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62107119369 + 5812537600 = 249213^2 + 76240^2 .

It is a cyclic number.

It is not a de Polignac number, because 67919656969 - 2¹¹ = 67919654921 is a prime.

It is a super-2 number, since 2×67919656969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67919656919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33959828484 + 33959828485.

It is an arithmetic number, because the mean of its divisors is an integer number (33959828485).

Almost surely, 2^67919656969 is an apocalyptic number.

It is an amenable number.

67919656969 is a deficient number, since it is larger than the sum of its proper divisors (1).

67919656969 is an equidigital number, since it uses as much as digits as its factorization.

67919656969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 297606960, while the sum is 73.

The spelling of 67919656969 in words is "sixty-seven billion, nine hundred nineteen million, six hundred fifty-six thousand, nine hundred sixty-nine".