87789171 has 8 divisors (see below), whose sum is σ = 118259344. Its totient is φ = 57922560.

The previous prime is 87789133. The next prime is 87789199. The reversal of 87789171 is 17198778.

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

It is not a de Polignac number, because 87789171 - 2¹⁴ = 87772787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87789171.

It is not an unprimeable number, because it can be changed into a prime (87789371) 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, 150550 + ... + 151131.

It is an arithmetic number, because the mean of its divisors is an integer number (14782418).

Almost surely, 2^87789171 is an apocalyptic number.

87789171 is a deficient number, since it is larger than the sum of its proper divisors (30470173).

87789171 is a wasteful number, since it uses less digits than its factorization.

87789171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301781.

The product of its digits is 197568, while the sum is 48.

The square root of 87789171 is about 9369.5875576249. The cubic root of 87789171 is about 444.4405223242.

The spelling of 87789171 in words is "eighty-seven million, seven hundred eighty-nine thousand, one hundred seventy-one".