197320979 has 4 divisors (see below), whose sum is σ = 205900176. Its totient is φ = 188741784.

The previous prime is 197320931. The next prime is 197320997. The reversal of 197320979 is 979023791.

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 197320979 - 2⁸ = 197320723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197320579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4289564 + ... + 4289609.

It is an arithmetic number, because the mean of its divisors is an integer number (51475044).

Almost surely, 2^197320979 is an apocalyptic number.

197320979 is a deficient number, since it is larger than the sum of its proper divisors (8579197).

197320979 is an equidigital number, since it uses as much as digits as its factorization.

197320979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8579196.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 197320979 is about 14047.0985972193. The cubic root of 197320979 is about 582.1806328311.

The spelling of 197320979 in words is "one hundred ninety-seven million, three hundred twenty thousand, nine hundred seventy-nine".