131558895997 has 2 divisors, whose sum is σ = 131558895998. Its totient is φ = 131558895996.

The previous prime is 131558895991. The next prime is 131558896057. The reversal of 131558895997 is 799598855131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110535635961 + 21023260036 = 332469^2 + 144994^2 .

It is an emirp because it is prime and its reverse (799598855131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131558895997 - 2²⁷ = 131424678269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131558895991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65779447998 + 65779447999.

It is an arithmetic number, because the mean of its divisors is an integer number (65779447999).

Almost surely, 2^131558895997 is an apocalyptic number.

It is an amenable number.

131558895997 is a deficient number, since it is larger than the sum of its proper divisors (1).

131558895997 is an equidigital number, since it uses as much as digits as its factorization.

131558895997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472000, while the sum is 70.

The spelling of 131558895997 in words is "one hundred thirty-one billion, five hundred fifty-eight million, eight hundred ninety-five thousand, nine hundred ninety-seven".