87819879 has 8 divisors (see below), whose sum is σ = 133820800. Its totient is φ = 50182776.

The previous prime is 87819839. The next prime is 87819899. The reversal of 87819879 is 97891878.

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

It is not a de Polignac number, because 87819879 - 2⁹ = 87819367 is a prime.

It is a super-2 number, since 2×87819879² = 15424662295149282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87819839) 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 7 ways as a sum of consecutive naturals, for example, 2090929 + ... + 2090970.

It is an arithmetic number, because the mean of its divisors is an integer number (16727600).

Almost surely, 2^87819879 is an apocalyptic number.

87819879 is a deficient number, since it is larger than the sum of its proper divisors (46000921).

87819879 is a wasteful number, since it uses less digits than its factorization.

87819879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181909.

The product of its digits is 2032128, while the sum is 57.

The square root of 87819879 is about 9371.2261204178. The cubic root of 87819879 is about 444.4923369478.

The spelling of 87819879 in words is "eighty-seven million, eight hundred nineteen thousand, eight hundred seventy-nine".