87577871 has 4 divisors (see below), whose sum is σ = 87993144. Its totient is φ = 87162600.

The previous prime is 87577849. The next prime is 87577891. The reversal of 87577871 is 17877578.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87577871 - 2¹⁸ = 87315727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87577811) 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 3 ways as a sum of consecutive naturals, for example, 207320 + ... + 207741.

It is an arithmetic number, because the mean of its divisors is an integer number (21998286).

Almost surely, 2^87577871 is an apocalyptic number.

87577871 is a deficient number, since it is larger than the sum of its proper divisors (415273).

87577871 is a wasteful number, since it uses less digits than its factorization.

87577871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415272.

The product of its digits is 768320, while the sum is 50.

The square root of 87577871 is about 9358.3049212985. The cubic root of 87577871 is about 444.0836608172.

The spelling of 87577871 in words is "eighty-seven million, five hundred seventy-seven thousand, eight hundred seventy-one".