99878087899 has 4 divisors (see below), whose sum is σ = 100664529664. Its totient is φ = 99091646136.

The previous prime is 99878087867. The next prime is 99878087909.

99878087899 is nontrivially palindromic in base 10.

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 99878087899 - 2⁵ = 99878087867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99878087839) 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, 393220692 + ... + 393220945.

It is an arithmetic number, because the mean of its divisors is an integer number (25166132416).

Almost surely, 2^99878087899 is an apocalyptic number.

99878087899 is a deficient number, since it is larger than the sum of its proper divisors (786441765).

99878087899 is a wasteful number, since it uses less digits than its factorization.

99878087899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786441764.

The product of its (nonzero) digits is 1316818944, while the sum is 82.

The spelling of 99878087899 in words is "ninety-nine billion, eight hundred seventy-eight million, eighty-seven thousand, eight hundred ninety-nine".