197066009 has 4 divisors (see below), whose sum is σ = 225218304. Its totient is φ = 168913716.

The previous prime is 197066003. The next prime is 197066021. The reversal of 197066009 is 900660791.

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 197066009 - 2⁴ = 197065993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (197066003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14076137 + ... + 14076150.

It is an arithmetic number, because the mean of its divisors is an integer number (56304576).

Almost surely, 2^197066009 is an apocalyptic number.

It is an amenable number.

197066009 is a deficient number, since it is larger than the sum of its proper divisors (28152295).

197066009 is an equidigital number, since it uses as much as digits as its factorization.

197066009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28152294.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 197066009 is about 14038.0201239349. The cubic root of 197066009 is about 581.9297681772.

The spelling of 197066009 in words is "one hundred ninety-seven million, sixty-six thousand, nine".