185987 has 2 divisors, whose sum is σ = 185988. Its totient is φ = 185986.

The previous prime is 185971. The next prime is 185993. The reversal of 185987 is 789581.

185987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 185987 - 2⁴ = 185971 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 185987.

It is not a weakly prime, because it can be changed into another prime (185917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92993 + 92994.

It is an arithmetic number, because the mean of its divisors is an integer number (92994).

2¹⁸⁵⁹⁸⁷ is an apocalyptic number.

185987 is a deficient number, since it is larger than the sum of its proper divisors (1).

185987 is an equidigital number, since it uses as much as digits as its factorization.

185987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 185987 is about 431.2621012795. The cubic root of 185987 is about 57.0813448198.

The spelling of 185987 in words is "one hundred eighty-five thousand, nine hundred eighty-seven".