1326920371237 has 2 divisors, whose sum is σ = 1326920371238. Its totient is φ = 1326920371236.

The previous prime is 1326920371193. The next prime is 1326920371247. The reversal of 1326920371237 is 7321730296231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1293294347361 + 33626023876 = 1137231^2 + 183374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1326920371237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326920371247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663460185618 + 663460185619.

It is an arithmetic number, because the mean of its divisors is an integer number (663460185619).

Almost surely, 2^{1326920371237} is an apocalyptic number.

It is an amenable number.

1326920371237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326920371237 is an equidigital number, since it uses as much as digits as its factorization.

1326920371237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 46.

The spelling of 1326920371237 in words is "one trillion, three hundred twenty-six billion, nine hundred twenty million, three hundred seventy-one thousand, two hundred thirty-seven".