87877887 has 4 divisors (see below), whose sum is σ = 117170520. Its totient is φ = 58585256.

The previous prime is 87877843. The next prime is 87877897. The reversal of 87877887 is 78877878.

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 87877887 - 2⁸ = 87877631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87877887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87877807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14646312 + ... + 14646317.

It is an arithmetic number, because the mean of its divisors is an integer number (29292630).

Almost surely, 2^87877887 is an apocalyptic number.

87877887 is a deficient number, since it is larger than the sum of its proper divisors (29292633).

87877887 is a wasteful number, since it uses less digits than its factorization.

87877887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29292632.

The product of its digits is 9834496, while the sum is 60.

The square root of 87877887 is about 9374.3206153833. The cubic root of 87877887 is about 444.5901828143.

Subtracting from 87877887 its reverse (78877878), we obtain a palindrome (9000009).

The spelling of 87877887 in words is "eighty-seven million, eight hundred seventy-seven thousand, eight hundred eighty-seven".