87130543 has 2 divisors, whose sum is σ = 87130544. Its totient is φ = 87130542.

The previous prime is 87130531. The next prime is 87130609. The reversal of 87130543 is 34503178.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87130543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87130643) 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, 43565271 + 43565272.

It is an arithmetic number, because the mean of its divisors is an integer number (43565272).

Almost surely, 2^87130543 is an apocalyptic number.

87130543 is a deficient number, since it is larger than the sum of its proper divisors (1).

87130543 is an equidigital number, since it uses as much as digits as its factorization.

87130543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 87130543 is about 9334.3742693338. The cubic root of 87130543 is about 443.3262767955.

The spelling of 87130543 in words is "eighty-seven million, one hundred thirty thousand, five hundred forty-three".