131424409 has 2 divisors, whose sum is σ = 131424410. Its totient is φ = 131424408.

The previous prime is 131424401. The next prime is 131424421. The reversal of 131424409 is 904424131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125372809 + 6051600 = 11197^2 + 2460^2 .

It is a cyclic number.

It is not a de Polignac number, because 131424409 - 2³ = 131424401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131424401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65712204 + 65712205.

It is an arithmetic number, because the mean of its divisors is an integer number (65712205).

Almost surely, 2^131424409 is an apocalyptic number.

It is an amenable number.

131424409 is a deficient number, since it is larger than the sum of its proper divisors (1).

131424409 is an equidigital number, since it uses as much as digits as its factorization.

131424409 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 131424409 is about 11464.0485431631. The cubic root of 131424409 is about 508.4231818488.

The spelling of 131424409 in words is "one hundred thirty-one million, four hundred twenty-four thousand, four hundred nine".