87143587 has 2 divisors, whose sum is σ = 87143588. Its totient is φ = 87143586.

The previous prime is 87143561. The next prime is 87143599. The reversal of 87143587 is 78534178.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87143587 is a prime.

It is not a weakly prime, because it can be changed into another prime (87143087) 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, 43571793 + 43571794.

It is an arithmetic number, because the mean of its divisors is an integer number (43571794).

Almost surely, 2^87143587 is an apocalyptic number.

87143587 is a deficient number, since it is larger than the sum of its proper divisors (1).

87143587 is an equidigital number, since it uses as much as digits as its factorization.

87143587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The square root of 87143587 is about 9335.0729509737. The cubic root of 87143587 is about 443.3483986187.

The spelling of 87143587 in words is "eighty-seven million, one hundred forty-three thousand, five hundred eighty-seven".