131530387 has 2 divisors, whose sum is σ = 131530388. Its totient is φ = 131530386.

The previous prime is 131530291. The next prime is 131530391. The reversal of 131530387 is 783035131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131530387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131530397) 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, 65765193 + 65765194.

It is an arithmetic number, because the mean of its divisors is an integer number (65765194).

Almost surely, 2^131530387 is an apocalyptic number.

131530387 is a deficient number, since it is larger than the sum of its proper divisors (1).

131530387 is an equidigital number, since it uses as much as digits as its factorization.

131530387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 131530387 is about 11468.6698008095. The cubic root of 131530387 is about 508.5598058743.

The spelling of 131530387 in words is "one hundred thirty-one million, five hundred thirty thousand, three hundred eighty-seven".