87864771 has 8 divisors (see below), whose sum is σ = 118758160. Its totient is φ = 57773952.

The previous prime is 87864769. The next prime is 87864779. The reversal of 87864771 is 17746878.

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

It is not a de Polignac number, because 87864771 - 2¹ = 87864769 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 87864771.

It is not an unprimeable number, because it can be changed into a prime (87864779) 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, 200386 + ... + 200823.

It is an arithmetic number, because the mean of its divisors is an integer number (14844770).

Almost surely, 2^87864771 is an apocalyptic number.

87864771 is a deficient number, since it is larger than the sum of its proper divisors (30893389).

87864771 is a wasteful number, since it uses less digits than its factorization.

87864771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401285.

The product of its digits is 526848, while the sum is 48.

The square root of 87864771 is about 9373.6210185819. The cubic root of 87864771 is about 444.5680629721.

The spelling of 87864771 in words is "eighty-seven million, eight hundred sixty-four thousand, seven hundred seventy-one".