131313449 has 2 divisors, whose sum is σ = 131313450. Its totient is φ = 131313448.

The previous prime is 131313437. The next prime is 131313451. The reversal of 131313449 is 944313131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 61340224 = 8365^2 + 7832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131313449 is a prime.

Together with 131313451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131312449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65656724 + 65656725.

It is an arithmetic number, because the mean of its divisors is an integer number (65656725).

Almost surely, 2^131313449 is an apocalyptic number.

It is an amenable number.

131313449 is a deficient number, since it is larger than the sum of its proper divisors (1).

131313449 is an equidigital number, since it uses as much as digits as its factorization.

131313449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 131313449 is about 11459.2080441887. The cubic root of 131313449 is about 508.2800564308.

The spelling of 131313449 in words is "one hundred thirty-one million, three hundred thirteen thousand, four hundred forty-nine".