2101791999 has 8 divisors (see below), whose sum is σ = 2814627760. Its totient is φ = 1395075456.

The previous prime is 2101791997. The next prime is 2101792037. The reversal of 2101791999 is 9991971012.

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

It is not a de Polignac number, because 2101791999 - 2¹ = 2101791997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101791997) 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, 1529002 + ... + 1530375.

It is an arithmetic number, because the mean of its divisors is an integer number (351828470).

Almost surely, 2^2101791999 is an apocalyptic number.

2101791999 is a deficient number, since it is larger than the sum of its proper divisors (712835761).

2101791999 is a wasteful number, since it uses less digits than its factorization.

2101791999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059609.

The product of its (nonzero) digits is 91854, while the sum is 48.

The square root of 2101791999 is about 45845.3050922338. The cubic root of 2101791999 is about 1280.9433148527.

The spelling of 2101791999 in words is "two billion, one hundred one million, seven hundred ninety-one thousand, nine hundred ninety-nine".