2779124789 has 8 divisors (see below), whose sum is σ = 3190387200. Its totient is φ = 2371423536.

The previous prime is 2779124779. The next prime is 2779124791. The reversal of 2779124789 is 9874219772.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2779124789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779124779) 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, 888614 + ... + 891735.

It is an arithmetic number, because the mean of its divisors is an integer number (398798400).

Almost surely, 2^2779124789 is an apocalyptic number.

It is an amenable number.

2779124789 is a deficient number, since it is larger than the sum of its proper divisors (411262411).

2779124789 is a wasteful number, since it uses less digits than its factorization.

2779124789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780579.

The product of its digits is 3556224, while the sum is 56.

The square root of 2779124789 is about 52717.4049911412. The cubic root of 2779124789 is about 1405.9482947706.

The spelling of 2779124789 in words is "two billion, seven hundred seventy-nine million, one hundred twenty-four thousand, seven hundred eighty-nine".