131315449 has 2 divisors, whose sum is σ = 131315450. Its totient is φ = 131315448.

The previous prime is 131315447. The next prime is 131315467. The reversal of 131315449 is 944513131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78854400 + 52461049 = 8880^2 + 7243^2 .

It is a cyclic number.

It is not a de Polignac number, because 131315449 - 2¹ = 131315447 is a prime.

Together with 131315447, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 131315449.

It is not a weakly prime, because it can be changed into another prime (131315447) 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, 65657724 + 65657725.

It is an arithmetic number, because the mean of its divisors is an integer number (65657725).

Almost surely, 2^131315449 is an apocalyptic number.

It is an amenable number.

131315449 is a deficient number, since it is larger than the sum of its proper divisors (1).

131315449 is an equidigital number, since it uses as much as digits as its factorization.

131315449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 131315449 is about 11459.2953099220. The cubic root of 131315449 is about 508.2826369102.

The spelling of 131315449 in words is "one hundred thirty-one million, three hundred fifteen thousand, four hundred forty-nine".