2168990109 has 96 divisors (see below), whose sum is σ = 3850905600. Its totient is φ = 1195871040.

The previous prime is 2168990107. The next prime is 2168990111. The reversal of 2168990109 is 9010998612.

It is an interprime number because it is at equal distance from previous prime (2168990107) and next prime (2168990111).

It is not a de Polignac number, because 2168990109 - 2¹ = 2168990107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168990107) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3964974 + ... + 3965520.

It is an arithmetic number, because the mean of its divisors is an integer number (40113600).

Almost surely, 2^2168990109 is an apocalyptic number.

It is an amenable number.

2168990109 is a deficient number, since it is larger than the sum of its proper divisors (1681915491).

2168990109 is a wasteful number, since it uses less digits than its factorization.

2168990109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 2168990109 is about 46572.4178994391. The cubic root of 2168990109 is about 1294.4517208141.

The spelling of 2168990109 in words is "two billion, one hundred sixty-eight million, nine hundred ninety thousand, one hundred nine".