1979939196 has 18 divisors (see below), whose sum is σ = 5004846392. Its totient is φ = 659979720.

The previous prime is 1979939191. The next prime is 1979939197. The reversal of 1979939196 is 6919399791.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979939191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27499120 + ... + 27499191.

Almost surely, 2^1979939196 is an apocalyptic number.

It is an amenable number.

1979939196 is an abundant number, since it is smaller than the sum of its proper divisors (3024907196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1979939196 is a wasteful number, since it uses less digits than its factorization.

1979939196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54998321 (or 54998316 counting only the distinct ones).

The product of its digits is 7440174, while the sum is 63.

The square root of 1979939196 is about 44496.5076831879. The cubic root of 1979939196 is about 1255.6943816364.

The spelling of 1979939196 in words is "one billion, nine hundred seventy-nine million, nine hundred thirty-nine thousand, one hundred ninety-six".