197212197 has 16 divisors (see below), whose sum is σ = 323630720. Its totient is φ = 104023872.

The previous prime is 197212159. The next prime is 197212199. The reversal of 197212197 is 791212791.

It is not a de Polignac number, because 197212197 - 2⁶ = 197212133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197212199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360922 + ... + 361467.

It is an arithmetic number, because the mean of its divisors is an integer number (20226920).

Almost surely, 2^197212197 is an apocalyptic number.

It is an amenable number.

197212197 is a deficient number, since it is larger than the sum of its proper divisors (126418523).

197212197 is a wasteful number, since it uses less digits than its factorization.

197212197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722412.

The product of its digits is 15876, while the sum is 39.

The square root of 197212197 is about 14043.2260182623. The cubic root of 197212197 is about 582.0736288091.

The spelling of 197212197 in words is "one hundred ninety-seven million, two hundred twelve thousand, one hundred ninety-seven".