131278963913 has 2 divisors, whose sum is σ = 131278963914. Its totient is φ = 131278963912.

The previous prime is 131278963877. The next prime is 131278963939. The reversal of 131278963913 is 319369872131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130922396224 + 356567689 = 361832^2 + 18883^2 .

It is a cyclic number.

It is not a de Polignac number, because 131278963913 - 2²⁰ = 131277915337 is a prime.

It is not a weakly prime, because it can be changed into another prime (131278963313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65639481956 + 65639481957.

It is an arithmetic number, because the mean of its divisors is an integer number (65639481957).

Almost surely, 2^131278963913 is an apocalyptic number.

It is an amenable number.

131278963913 is a deficient number, since it is larger than the sum of its proper divisors (1).

131278963913 is an equidigital number, since it uses as much as digits as its factorization.

131278963913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The spelling of 131278963913 in words is "one hundred thirty-one billion, two hundred seventy-eight million, nine hundred sixty-three thousand, nine hundred thirteen".