131371109 has 2 divisors, whose sum is σ = 131371110. Its totient is φ = 131371108.

The previous prime is 131371099. The next prime is 131371129. The reversal of 131371109 is 901173131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107702884 + 23668225 = 10378^2 + 4865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131371109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131371129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65685554 + 65685555.

It is an arithmetic number, because the mean of its divisors is an integer number (65685555).

Almost surely, 2^131371109 is an apocalyptic number.

It is an amenable number.

131371109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131371109 is an equidigital number, since it uses as much as digits as its factorization.

131371109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 131371109 is about 11461.7236487363. The cubic root of 131371109 is about 508.3544411433.

The spelling of 131371109 in words is "one hundred thirty-one million, three hundred seventy-one thousand, one hundred nine".