196873979 has 4 divisors (see below), whose sum is σ = 197017920. Its totient is φ = 196730040.

The previous prime is 196873967. The next prime is 196873981. The reversal of 196873979 is 979378691.

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 196873979 - 2²⁰ = 195825403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196873279) 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, 69899 + ... + 72660.

It is an arithmetic number, because the mean of its divisors is an integer number (49254480).

Almost surely, 2^196873979 is an apocalyptic number.

196873979 is a deficient number, since it is larger than the sum of its proper divisors (143941).

196873979 is a wasteful number, since it uses less digits than its factorization.

196873979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143940.

The product of its digits is 5143824, while the sum is 59.

The square root of 196873979 is about 14031.1788171914. The cubic root of 196873979 is about 581.7406872173.

The spelling of 196873979 in words is "one hundred ninety-six million, eight hundred seventy-three thousand, nine hundred seventy-nine".