131343449 has 2 divisors, whose sum is σ = 131343450. Its totient is φ = 131343448.

The previous prime is 131343379. The next prime is 131343461. The reversal of 131343449 is 944343131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112360000 + 18983449 = 10600^2 + 4357^2 .

It is a cyclic number.

It is not a de Polignac number, because 131343449 - 2²⁰ = 130294873 is a prime.

It is a super-2 number, since 2×131343449² = 34502203190431202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131343469) 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, 65671724 + 65671725.

It is an arithmetic number, because the mean of its divisors is an integer number (65671725).

Almost surely, 2^131343449 is an apocalyptic number.

It is an amenable number.

131343449 is a deficient number, since it is larger than the sum of its proper divisors (1).

131343449 is an equidigital number, since it uses as much as digits as its factorization.

131343449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 131343449 is about 11460.5169604168. The cubic root of 131343449 is about 508.3187608710.

The spelling of 131343449 in words is "one hundred thirty-one million, three hundred forty-three thousand, four hundred forty-nine".