87189587 has 2 divisors, whose sum is σ = 87189588. Its totient is φ = 87189586.

The previous prime is 87189581. The next prime is 87189589. The reversal of 87189587 is 78598178.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87189587 - 2¹² = 87185491 is a prime.

Together with 87189589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87189581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43594793 + 43594794.

It is an arithmetic number, because the mean of its divisors is an integer number (43594794).

Almost surely, 2^87189587 is an apocalyptic number.

87189587 is a deficient number, since it is larger than the sum of its proper divisors (1).

87189587 is an equidigital number, since it uses as much as digits as its factorization.

87189587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 53.

The square root of 87189587 is about 9337.5364524054. The cubic root of 87189587 is about 443.4263941801.

The spelling of 87189587 in words is "eighty-seven million, one hundred eighty-nine thousand, five hundred eighty-seven".