87584521 has 4 divisors (see below), whose sum is σ = 88074000. Its totient is φ = 87095044.

The previous prime is 87584479. The next prime is 87584533. The reversal of 87584521 is 12548578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87584521 - 2⁹ = 87584009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87584551) 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 3 ways as a sum of consecutive naturals, for example, 244471 + ... + 244828.

It is an arithmetic number, because the mean of its divisors is an integer number (22018500).

Almost surely, 2^87584521 is an apocalyptic number.

It is an amenable number.

87584521 is a deficient number, since it is larger than the sum of its proper divisors (489479).

87584521 is a wasteful number, since it uses less digits than its factorization.

87584521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489478.

The product of its digits is 89600, while the sum is 40.

The square root of 87584521 is about 9358.6602139409. The cubic root of 87584521 is about 444.0949006489.

The spelling of 87584521 in words is "eighty-seven million, five hundred eighty-four thousand, five hundred twenty-one".