87655389 has 8 divisors (see below), whose sum is σ = 117480192. Its totient is φ = 58133760.

The previous prime is 87655361. The next prime is 87655391. The reversal of 87655389 is 98355678.

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

It is not a de Polignac number, because 87655389 - 2¹⁹ = 87131101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87655289) 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, 75117 + ... + 76274.

It is an arithmetic number, because the mean of its divisors is an integer number (14685024).

Almost surely, 2^87655389 is an apocalyptic number.

It is an amenable number.

87655389 is a deficient number, since it is larger than the sum of its proper divisors (29824803).

87655389 is a wasteful number, since it uses less digits than its factorization.

87655389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151587.

The product of its digits is 1814400, while the sum is 51.

The square root of 87655389 is about 9362.4456740747. The cubic root of 87655389 is about 444.2146464382.

It can be divided in two parts, 876 and 55389, that added together give a palindrome (56265).

The spelling of 87655389 in words is "eighty-seven million, six hundred fifty-five thousand, three hundred eighty-nine".