87879999 has 8 divisors (see below), whose sum is σ = 118333872. Its totient is φ = 58006400.

The previous prime is 87879977. The next prime is 87880007. The reversal of 87879999 is 99997878.

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

It is a cyclic number.

It is not a de Polignac number, because 87879999 - 2²⁵ = 54325567 is a prime.

87879999 is a modest number, since divided by 9999 gives 8787 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87879929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144714 + ... + 145319.

It is an arithmetic number, because the mean of its divisors is an integer number (14791734).

Almost surely, 2^87879999 is an apocalyptic number.

87879999 is a deficient number, since it is larger than the sum of its proper divisors (30453873).

87879999 is a wasteful number, since it uses less digits than its factorization.

87879999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290137.

The product of its digits is 20575296, while the sum is 66.

The square root of 87879999 is about 9374.4332628698. The cubic root of 87879999 is about 444.5937444496.

The spelling of 87879999 in words is "eighty-seven million, eight hundred seventy-nine thousand, nine hundred ninety-nine".