2099999987 has 8 divisors (see below), whose sum is σ = 2275240176. Its totient is φ = 1930505472.

The previous prime is 2099999983. The next prime is 2099999989. The reversal of 2099999987 is 7899999902.

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 2099999987 - 2² = 2099999983 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 20 and 99999987 contains 2099999987 itself.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2099999987.

It is not an unprimeable number, because it can be changed into a prime (2099999983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435658 + ... + 1437119.

It is an arithmetic number, because the mean of its divisors is an integer number (284405022).

Almost surely, 2^2099999987 is an apocalyptic number.

2099999987 is a deficient number, since it is larger than the sum of its proper divisors (175240189).

2099999987 is a wasteful number, since it uses less digits than its factorization.

2099999987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872837.

The product of its (nonzero) digits is 59521392, while the sum is 71.

The square root of 2099999987 is about 45825.7568077168. The cubic root of 2099999987 is about 1280.5791623450.

The spelling of 2099999987 in words is "two billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-seven".