87198549 has 8 divisors (see below), whose sum is σ = 116961600. Its totient is φ = 57783936.

The previous prime is 87198523. The next prime is 87198577. The reversal of 87198549 is 94589178.

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

It is a de Polignac number, because none of the positive numbers 2^k-87198549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87198149) 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 7 ways as a sum of consecutive naturals, for example, 86524 + ... + 87525.

It is an arithmetic number, because the mean of its divisors is an integer number (14620200).

Almost surely, 2^87198549 is an apocalyptic number.

It is an amenable number.

87198549 is a deficient number, since it is larger than the sum of its proper divisors (29763051).

87198549 is a wasteful number, since it uses less digits than its factorization.

87198549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174219.

The product of its digits is 725760, while the sum is 51.

The square root of 87198549 is about 9338.0163311059. The cubic root of 87198549 is about 443.4415865569.

The spelling of 87198549 in words is "eighty-seven million, one hundred ninety-eight thousand, five hundred forty-nine".