2123881689 has 32 divisors (see below), whose sum is σ = 3025797120. Its totient is φ = 1320534272.

The previous prime is 2123881679. The next prime is 2123881759. The reversal of 2123881689 is 9861883212.

It is a cyclic number.

It is not a de Polignac number, because 2123881689 - 2¹³ = 2123873497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2123881619) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4433752 + ... + 4434230.

It is an arithmetic number, because the mean of its divisors is an integer number (94556160).

Almost surely, 2^2123881689 is an apocalyptic number.

It is an amenable number.

2123881689 is a deficient number, since it is larger than the sum of its proper divisors (901915431).

2123881689 is a wasteful number, since it uses less digits than its factorization.

2123881689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109.

The product of its digits is 331776, while the sum is 48.

The square root of 2123881689 is about 46085.5909043163. The cubic root of 2123881689 is about 1285.4152269325.

The spelling of 2123881689 in words is "two billion, one hundred twenty-three million, eight hundred eighty-one thousand, six hundred eighty-nine".