197893221 has 8 divisors (see below), whose sum is σ = 263922624. Its totient is φ = 131896320.

The previous prime is 197893207. The next prime is 197893229. The reversal of 197893221 is 122398791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197893221 - 2⁷ = 197893093 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197893229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19656 + ... + 27966.

It is an arithmetic number, because the mean of its divisors is an integer number (32990328).

Almost surely, 2^197893221 is an apocalyptic number.

It is an amenable number.

197893221 is a deficient number, since it is larger than the sum of its proper divisors (66029403).

197893221 is an equidigital number, since it uses as much as digits as its factorization.

197893221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16251.

The product of its digits is 54432, while the sum is 42.

The square root of 197893221 is about 14067.4525412386. The cubic root of 197893221 is about 582.7428752574.

The spelling of 197893221 in words is "one hundred ninety-seven million, eight hundred ninety-three thousand, two hundred twenty-one".