197996217 has 8 divisors (see below), whose sum is σ = 264172224. Its totient is φ = 131908848.

The previous prime is 197996203. The next prime is 197996231. The reversal of 197996217 is 712699791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (197996203) and next prime (197996231).

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

It is not a de Polignac number, because 197996217 - 2⁷ = 197996089 is a prime.

It is a super-2 number, since 2×197996217² = 78405003892622178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 197996217.

It is not an unprimeable number, because it can be changed into a prime (197996237) 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 7 ways as a sum of consecutive naturals, for example, 16758 + ... + 26015.

It is an arithmetic number, because the mean of its divisors is an integer number (33021528).

Almost surely, 2^197996217 is an apocalyptic number.

It is an amenable number.

197996217 is a deficient number, since it is larger than the sum of its proper divisors (66176007).

197996217 is a wasteful number, since it uses less digits than its factorization.

197996217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44319.

The product of its digits is 428652, while the sum is 51.

The square root of 197996217 is about 14071.1128557765. The cubic root of 197996217 is about 582.8439563272.

The spelling of 197996217 in words is "one hundred ninety-seven million, nine hundred ninety-six thousand, two hundred seventeen".