131966207993 has 2 divisors, whose sum is σ = 131966207994. Its totient is φ = 131966207992.

The previous prime is 131966207969. The next prime is 131966208061. The reversal of 131966207993 is 399702669131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127154288569 + 4811919424 = 356587^2 + 69368^2 .

It is a cyclic number.

It is not a de Polignac number, because 131966207993 - 2¹⁶ = 131966142457 is a prime.

It is not a weakly prime, because it can be changed into another prime (131966207963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65983103996 + 65983103997.

It is an arithmetic number, because the mean of its divisors is an integer number (65983103997).

Almost surely, 2^131966207993 is an apocalyptic number.

It is an amenable number.

131966207993 is a deficient number, since it is larger than the sum of its proper divisors (1).

131966207993 is an equidigital number, since it uses as much as digits as its factorization.

131966207993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The spelling of 131966207993 in words is "one hundred thirty-one billion, nine hundred sixty-six million, two hundred seven thousand, nine hundred ninety-three".