87654189 has 24 divisors (see below), whose sum is σ = 136384128. Its totient is φ = 49929600.

The previous prime is 87654181. The next prime is 87654233. The reversal of 87654189 is 98145678.

It is not a de Polignac number, because 87654189 - 2³ = 87654181 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87654181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58204 + ... + 59690.

It is an arithmetic number, because the mean of its divisors is an integer number (5682672).

Almost surely, 2^87654189 is an apocalyptic number.

It is an amenable number.

87654189 is a deficient number, since it is larger than the sum of its proper divisors (48729939).

87654189 is a wasteful number, since it uses less digits than its factorization.

87654189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905 (or 1898 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 87654189 is about 9362.3815880362. The cubic root of 87654189 is about 444.2126193333.

The spelling of 87654189 in words is "eighty-seven million, six hundred fifty-four thousand, one hundred eighty-nine".