197208869 has 16 divisors (see below), whose sum is σ = 233245824. Its totient is φ = 164376000.

The previous prime is 197208859. The next prime is 197208871. The reversal of 197208869 is 968802791.

It is a cyclic number.

It is not a de Polignac number, because 197208869 - 2¹² = 197204773 is a prime.

It is a super-2 number, since 2×197208869² = 77782676024518322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197208859) 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 15 ways as a sum of consecutive naturals, for example, 17027 + ... + 26159.

It is an arithmetic number, because the mean of its divisors is an integer number (14577864).

Almost surely, 2^197208869 is an apocalyptic number.

It is an amenable number.

197208869 is a deficient number, since it is larger than the sum of its proper divisors (36036955).

197208869 is a wasteful number, since it uses less digits than its factorization.

197208869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9308.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 197208869 is about 14043.1075264701. The cubic root of 197208869 is about 582.0703545830.

The spelling of 197208869 in words is "one hundred ninety-seven million, two hundred eight thousand, eight hundred sixty-nine".