2720123999 has 16 divisors (see below), whose sum is σ = 2900383200. Its totient is φ = 2543675904.

The previous prime is 2720123983. The next prime is 2720124091. The reversal of 2720123999 is 9993210272.

It is a cyclic number.

It is not a de Polignac number, because 2720123999 - 2⁴ = 2720123983 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 (2720123099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1448249 + ... + 1450125.

It is an arithmetic number, because the mean of its divisors is an integer number (181273950).

Almost surely, 2^2720123999 is an apocalyptic number.

2720123999 is a deficient number, since it is larger than the sum of its proper divisors (180259201).

2720123999 is a wasteful number, since it uses less digits than its factorization.

2720123999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 2720123999 is about 52154.8080142186. The cubic root of 2720123999 is about 1395.9276211917.

The spelling of 2720123999 in words is "two billion, seven hundred twenty million, one hundred twenty-three thousand, nine hundred ninety-nine".