197979223 has 4 divisors (see below), whose sum is σ = 213208408. Its totient is φ = 182750040.

The previous prime is 197979209. The next prime is 197979227. The reversal of 197979223 is 322979791.

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 197979223 - 2¹⁷ = 197848151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197979227) 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, 7614573 + ... + 7614598.

It is an arithmetic number, because the mean of its divisors is an integer number (53302102).

Almost surely, 2^197979223 is an apocalyptic number.

197979223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

197979223 is a deficient number, since it is larger than the sum of its proper divisors (15229185).

197979223 is a wasteful number, since it uses less digits than its factorization.

197979223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15229184.

The product of its digits is 428652, while the sum is 49.

The square root of 197979223 is about 14070.5089815543. The cubic root of 197979223 is about 582.8272806995.

The spelling of 197979223 in words is "one hundred ninety-seven million, nine hundred seventy-nine thousand, two hundred twenty-three".