131163901109 has 2 divisors, whose sum is σ = 131163901110. Its totient is φ = 131163901108.

The previous prime is 131163901087. The next prime is 131163901133. The reversal of 131163901109 is 901109361131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66496936900 + 64666964209 = 257870^2 + 254297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131163901109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131163901159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65581950554 + 65581950555.

It is an arithmetic number, because the mean of its divisors is an integer number (65581950555).

Almost surely, 2^131163901109 is an apocalyptic number.

It is an amenable number.

131163901109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131163901109 is an equidigital number, since it uses as much as digits as its factorization.

131163901109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 35.

The spelling of 131163901109 in words is "one hundred thirty-one billion, one hundred sixty-three million, nine hundred one thousand, one hundred nine".