87219999879 has 4 divisors (see below), whose sum is σ = 116293333176. Its totient is φ = 58146666584.

The previous prime is 87219999869. The next prime is 87220000013. The reversal of 87219999879 is 97899991278.

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 87219999879 - 2⁵ = 87219999847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87219999809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14536666644 + ... + 14536666649.

It is an arithmetic number, because the mean of its divisors is an integer number (29073333294).

Almost surely, 2^87219999879 is an apocalyptic number.

87219999879 is a deficient number, since it is larger than the sum of its proper divisors (29073333297).

87219999879 is a wasteful number, since it uses less digits than its factorization.

87219999879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29073333296.

The product of its digits is 370355328, while the sum is 78.

The spelling of 87219999879 in words is "eighty-seven billion, two hundred nineteen million, nine hundred ninety-nine thousand, eight hundred seventy-nine".