87688321 has 8 divisors (see below), whose sum is σ = 100367424. Its totient is φ = 75047280.

The previous prime is 87688313. The next prime is 87688333. The reversal of 87688321 is 12388678.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87688321 - 2³ = 87688313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87688361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4390 + ... + 13951.

It is an arithmetic number, because the mean of its divisors is an integer number (12545928).

Almost surely, 2^87688321 is an apocalyptic number.

It is an amenable number.

87688321 is a deficient number, since it is larger than the sum of its proper divisors (12679103).

87688321 is a wasteful number, since it uses less digits than its factorization.

87688321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19031.

The product of its digits is 129024, while the sum is 43.

The square root of 87688321 is about 9364.2042374139. The cubic root of 87688321 is about 444.2702697348.

The spelling of 87688321 in words is "eighty-seven million, six hundred eighty-eight thousand, three hundred twenty-one".