87855879 has 4 divisors (see below), whose sum is σ = 117141176. Its totient is φ = 58570584.

The previous prime is 87855869. The next prime is 87855917. The reversal of 87855879 is 97855878.

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

It is not a de Polignac number, because 87855879 - 2⁴ = 87855863 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 (87855809) 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, 14642644 + ... + 14642649.

It is an arithmetic number, because the mean of its divisors is an integer number (29285294).

Almost surely, 2^87855879 is an apocalyptic number.

87855879 is a deficient number, since it is larger than the sum of its proper divisors (29285297).

87855879 is a wasteful number, since it uses less digits than its factorization.

87855879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29285296.

The product of its digits is 5644800, while the sum is 57.

The square root of 87855879 is about 9373.1466968143. The cubic root of 87855879 is about 444.5530655599.

Subtracting 87855879 from its reverse (97855878), we obtain a palindrome (9999999).

The spelling of 87855879 in words is "eighty-seven million, eight hundred fifty-five thousand, eight hundred seventy-nine".