87827409 has 20 divisors (see below), whose sum is σ = 136906176. Its totient is φ = 56004696.

The previous prime is 87827357. The next prime is 87827417. The reversal of 87827409 is 90472878.

It is not a de Polignac number, because 87827409 - 2⁷ = 87827281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87827449) 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 in 19 ways as a sum of consecutive naturals, for example, 21709 + ... + 25434.

Almost surely, 2^87827409 is an apocalyptic number.

It is an amenable number.

87827409 is a deficient number, since it is larger than the sum of its proper divisors (49078767).

87827409 is a wasteful number, since it uses less digits than its factorization.

87827409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47178 (or 47169 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 87827409 is about 9371.6278735340. The cubic root of 87827409 is about 444.5050407216.

The spelling of 87827409 in words is "eighty-seven million, eight hundred twenty-seven thousand, four hundred nine".