131441309 has 2 divisors, whose sum is σ = 131441310. Its totient is φ = 131441308.

The previous prime is 131441273. The next prime is 131441371. The reversal of 131441309 is 903144131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 16630084 = 10715^2 + 4078^2 .

It is a cyclic number.

It is not a de Polignac number, because 131441309 - 2⁸ = 131441053 is a prime.

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 (131441509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65720654 + 65720655.

It is an arithmetic number, because the mean of its divisors is an integer number (65720655).

Almost surely, 2^131441309 is an apocalyptic number.

It is an amenable number.

131441309 is a deficient number, since it is larger than the sum of its proper divisors (1).

131441309 is an equidigital number, since it uses as much as digits as its factorization.

131441309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 131441309 is about 11464.7856063687. The cubic root of 131441309 is about 508.4449738015. Note that the first 3 decimals are identical.

The spelling of 131441309 in words is "one hundred thirty-one million, four hundred forty-one thousand, three hundred nine".