1979719939 has 8 divisors (see below), whose sum is σ = 1997380800. Its totient is φ = 1962117696.

The previous prime is 1979719927. The next prime is 1979719961. The reversal of 1979719939 is 9399179791.

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 1979719939 - 2¹¹ = 1979717891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979719979) 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, 54639 + ... + 83335.

It is an arithmetic number, because the mean of its divisors is an integer number (249672600).

Almost surely, 2^1979719939 is an apocalyptic number.

1979719939 is a deficient number, since it is larger than the sum of its proper divisors (17660861).

1979719939 is a wasteful number, since it uses less digits than its factorization.

1979719939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29309.

The product of its digits is 8680203, while the sum is 64.

The square root of 1979719939 is about 44494.0438598247. The cubic root of 1979719939 is about 1255.6480283701.

The spelling of 1979719939 in words is "one billion, nine hundred seventy-nine million, seven hundred nineteen thousand, nine hundred thirty-nine".