1968696181 has 2 divisors, whose sum is σ = 1968696182. Its totient is φ = 1968696180.

The previous prime is 1968696167. The next prime is 1968696239. The reversal of 1968696181 is 1816968691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119906225 + 848789956 = 33465^2 + 29134^2 .

It is an emirp because it is prime and its reverse (1816968691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1968696181 - 2⁷ = 1968696053 is a prime.

It is a super-2 number, since 2×1968696181² = 7751529306167969522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968696131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984348090 + 984348091.

It is an arithmetic number, because the mean of its divisors is an integer number (984348091).

Almost surely, 2^1968696181 is an apocalyptic number.

It is an amenable number.

1968696181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968696181 is an equidigital number, since it uses as much as digits as its factorization.

1968696181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 55.

The square root of 1968696181 is about 44369.9918976779. The cubic root of 1968696181 is about 1253.3130630791.

The spelling of 1968696181 in words is "one billion, nine hundred sixty-eight million, six hundred ninety-six thousand, one hundred eighty-one".