197266109 has 4 divisors (see below), whose sum is σ = 197555616. Its totient is φ = 196976604.

The previous prime is 197266103. The next prime is 197266117. The reversal of 197266109 is 901662791.

197266109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197266109 - 2⁴ = 197266093 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 (197266103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143729 + ... + 145094.

It is an arithmetic number, because the mean of its divisors is an integer number (49388904).

Almost surely, 2^197266109 is an apocalyptic number.

It is an amenable number.

197266109 is a deficient number, since it is larger than the sum of its proper divisors (289507).

197266109 is an equidigital number, since it uses as much as digits as its factorization.

197266109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289506.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 197266109 is about 14045.1453890659. The cubic root of 197266109 is about 582.1266645659.

The spelling of 197266109 in words is "one hundred ninety-seven million, two hundred sixty-six thousand, one hundred nine".