131328761 has 2 divisors, whose sum is σ = 131328762. Its totient is φ = 131328760.

The previous prime is 131328739. The next prime is 131328793. The reversal of 131328761 is 167823131.

It is an a-pointer prime, because the next prime (131328793) can be obtained adding 131328761 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126787600 + 4541161 = 11260^2 + 2131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131328761 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131328661) 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, 65664380 + 65664381.

It is an arithmetic number, because the mean of its divisors is an integer number (65664381).

Almost surely, 2^131328761 is an apocalyptic number.

It is an amenable number.

131328761 is a deficient number, since it is larger than the sum of its proper divisors (1).

131328761 is an equidigital number, since it uses as much as digits as its factorization.

131328761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 131328761 is about 11459.8761337110. The cubic root of 131328761 is about 508.2998119136.

The spelling of 131328761 in words is "one hundred thirty-one million, three hundred twenty-eight thousand, seven hundred sixty-one".