2109703681 has 8 divisors (see below), whose sum is σ = 2209806720. Its totient is φ = 2010298752.

The previous prime is 2109703657. The next prime is 2109703691. The reversal of 2109703681 is 1863079012.

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 2109703681 - 2⁵ = 2109703649 is a prime.

It is a super-2 number, since 2×2109703681² = 8901699243249899522, which contains 22 as substring.

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 2109703681.

It is not an unprimeable number, because it can be changed into a prime (2109703691) 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, 168336 + ... + 180433.

It is an arithmetic number, because the mean of its divisors is an integer number (276225840).

Almost surely, 2^2109703681 is an apocalyptic number.

It is an amenable number.

2109703681 is a deficient number, since it is larger than the sum of its proper divisors (100103039).

2109703681 is a wasteful number, since it uses less digits than its factorization.

2109703681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349055.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2109703681 is about 45931.5107633093. The cubic root of 2109703681 is about 1282.5485682937.

The spelling of 2109703681 in words is "two billion, one hundred nine million, seven hundred three thousand, six hundred eighty-one".