130531409 has 2 divisors, whose sum is σ = 130531410. Its totient is φ = 130531408.

The previous prime is 130531403. The next prime is 130531433. The reversal of 130531409 is 904135031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130530625 + 784 = 11425^2 + 28^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130531409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (130531403) 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, 65265704 + 65265705.

It is an arithmetic number, because the mean of its divisors is an integer number (65265705).

Almost surely, 2^130531409 is an apocalyptic number.

It is an amenable number.

130531409 is a deficient number, since it is larger than the sum of its proper divisors (1).

130531409 is an equidigital number, since it uses as much as digits as its factorization.

130531409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 130531409 is about 11425.0343106706. The cubic root of 130531409 is about 507.2690225094.

The spelling of 130531409 in words is "one hundred thirty million, five hundred thirty-one thousand, four hundred nine".