196912979 has 4 divisors (see below), whose sum is σ = 207276840. Its totient is φ = 186549120.

The previous prime is 196912957. The next prime is 196912981. The reversal of 196912979 is 979219691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979219691 = 10883 ⋅89977.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196912979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196912979.

It is not an unprimeable number, because it can be changed into a prime (196912949) 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 3 ways as a sum of consecutive naturals, for example, 5181902 + ... + 5181939.

It is an arithmetic number, because the mean of its divisors is an integer number (51819210).

Almost surely, 2^196912979 is an apocalyptic number.

196912979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

196912979 is a deficient number, since it is larger than the sum of its proper divisors (10363861).

196912979 is a wasteful number, since it uses less digits than its factorization.

196912979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10363860.

The product of its digits is 551124, while the sum is 53.

The square root of 196912979 is about 14032.5685104331. The cubic root of 196912979 is about 581.7790982336.

The spelling of 196912979 in words is "one hundred ninety-six million, nine hundred twelve thousand, nine hundred seventy-nine".