87828187 has 2 divisors, whose sum is σ = 87828188. Its totient is φ = 87828186.

The previous prime is 87828161. The next prime is 87828217. The reversal of 87828187 is 78182878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87828187 - 2¹¹ = 87826139 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 87828187.

It is not a weakly prime, because it can be changed into another prime (87828107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43914093 + 43914094.

It is an arithmetic number, because the mean of its divisors is an integer number (43914094).

Almost surely, 2^87828187 is an apocalyptic number.

87828187 is a deficient number, since it is larger than the sum of its proper divisors (1).

87828187 is an equidigital number, since it uses as much as digits as its factorization.

87828187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 401408, while the sum is 49.

The square root of 87828187 is about 9371.6693817057. The cubic root of 87828187 is about 444.5063532348.

The spelling of 87828187 in words is "eighty-seven million, eight hundred twenty-eight thousand, one hundred eighty-seven".