131440249 has 2 divisors, whose sum is σ = 131440250. Its totient is φ = 131440248.

The previous prime is 131440213. The next prime is 131440261. The reversal of 131440249 is 942044131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126787600 + 4652649 = 11260^2 + 2157^2 .

It is a cyclic number.

It is not a de Polignac number, because 131440249 - 2¹⁷ = 131309177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131440349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65720124 + 65720125.

It is an arithmetic number, because the mean of its divisors is an integer number (65720125).

Almost surely, 2^131440249 is an apocalyptic number.

It is an amenable number.

131440249 is a deficient number, since it is larger than the sum of its proper divisors (1).

131440249 is an equidigital number, since it uses as much as digits as its factorization.

131440249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 131440249 is about 11464.7393777617. The cubic root of 131440249 is about 508.4436070239.

The spelling of 131440249 in words is "one hundred thirty-one million, four hundred forty thousand, two hundred forty-nine".