131041028309 has 2 divisors, whose sum is σ = 131041028310. Its totient is φ = 131041028308.

The previous prime is 131041028303. The next prime is 131041028333. The reversal of 131041028309 is 903820140131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89429108209 + 41611920100 = 299047^2 + 203990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131041028309 is a prime.

It is a super-2 number, since 2×131041028309² (a number of 23 digits) contains 22 as substring.

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 (131041028303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65520514154 + 65520514155.

It is an arithmetic number, because the mean of its divisors is an integer number (65520514155).

Almost surely, 2^131041028309 is an apocalyptic number.

It is an amenable number.

131041028309 is a deficient number, since it is larger than the sum of its proper divisors (1).

131041028309 is an equidigital number, since it uses as much as digits as its factorization.

131041028309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 131041028309 in words is "one hundred thirty-one billion, forty-one million, twenty-eight thousand, three hundred nine".