87189663 has 8 divisors (see below), whose sum is σ = 126821376. Its totient is φ = 52842200.

The previous prime is 87189637. The next prime is 87189671. The reversal of 87189663 is 36698178.

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

It is a cyclic number.

It is not a de Polignac number, because 87189663 - 2¹⁴ = 87173279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87189163) 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, 1321023 + ... + 1321088.

It is an arithmetic number, because the mean of its divisors is an integer number (15852672).

Almost surely, 2^87189663 is an apocalyptic number.

87189663 is a deficient number, since it is larger than the sum of its proper divisors (39631713).

87189663 is a wasteful number, since it uses less digits than its factorization.

87189663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642125.

The product of its digits is 435456, while the sum is 48.

The square root of 87189663 is about 9337.5405220004. The cubic root of 87189663 is about 443.4265230196.

It can be divided in two parts, 8718 and 9663, that added together give a palindrome (18381).

The spelling of 87189663 in words is "eighty-seven million, one hundred eighty-nine thousand, six hundred sixty-three".