1323680681 has 2 divisors, whose sum is σ = 1323680682. Its totient is φ = 1323680680.

The previous prime is 1323680641. The next prime is 1323680719. The reversal of 1323680681 is 1860863231.

It is an a-pointer prime, because the next prime (1323680719) can be obtained adding 1323680681 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1284505600 + 39175081 = 35840^2 + 6259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323680681 is a prime.

It is a super-2 number, since 2×1323680681² = 3504261090505247522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1323680621) 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, 661840340 + 661840341.

It is an arithmetic number, because the mean of its divisors is an integer number (661840341).

Almost surely, 2^1323680681 is an apocalyptic number.

It is an amenable number.

1323680681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323680681 is an equidigital number, since it uses as much as digits as its factorization.

1323680681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1323680681 is about 36382.4226928334. The cubic root of 1323680681 is about 1097.9799513151.

The spelling of 1323680681 in words is "one billion, three hundred twenty-three million, six hundred eighty thousand, six hundred eighty-one".