2719779779 has 4 divisors (see below), whose sum is σ = 2739346680. Its totient is φ = 2700212880.

The previous prime is 2719779763. The next prime is 2719779841. The reversal of 2719779779 is 9779779172.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2719779779 - 2⁴ = 2719779763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2719779479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9783242 + ... + 9783519.

It is an arithmetic number, because the mean of its divisors is an integer number (684836670).

Almost surely, 2^2719779779 is an apocalyptic number.

2719779779 is a deficient number, since it is larger than the sum of its proper divisors (19566901).

2719779779 is a wasteful number, since it uses less digits than its factorization.

2719779779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19566900.

The product of its digits is 24504606, while the sum is 65.

The square root of 2719779779 is about 52151.5079264253. The cubic root of 2719779779 is about 1395.8687358276.

The spelling of 2719779779 in words is "two billion, seven hundred nineteen million, seven hundred seventy-nine thousand, seven hundred seventy-nine".