87828217 has 2 divisors, whose sum is σ = 87828218. Its totient is φ = 87828216.

The previous prime is 87828187. The next prime is 87828263. The reversal of 87828217 is 71282878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85766121 + 2062096 = 9261^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 87828217 - 2¹¹ = 87826169 is a prime.

It is not a weakly prime, because it can be changed into another prime (87828017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43914108 + 43914109.

It is an arithmetic number, because the mean of its divisors is an integer number (43914109).

Almost surely, 2^87828217 is an apocalyptic number.

It is an amenable number.

87828217 is a deficient number, since it is larger than the sum of its proper divisors (1).

87828217 is an equidigital number, since it uses as much as digits as its factorization.

87828217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 43.

The square root of 87828217 is about 9371.6709822742. The cubic root of 87828217 is about 444.5064038457.

The spelling of 87828217 in words is "eighty-seven million, eight hundred twenty-eight thousand, two hundred seventeen".