197536109 has 4 divisors (see below), whose sum is σ = 202130016. Its totient is φ = 192942204.

The previous prime is 197536093. The next prime is 197536127. The reversal of 197536109 is 901635791.

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, and also an emirpimes, since its reverse is a distinct semiprime: 901635791 = 7 ⋅128805113.

It is not a de Polignac number, because 197536109 - 2⁴ = 197536093 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 (197536169) 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, 2296889 + ... + 2296974.

It is an arithmetic number, because the mean of its divisors is an integer number (50532504).

Almost surely, 2^197536109 is an apocalyptic number.

It is an amenable number.

197536109 is a deficient number, since it is larger than the sum of its proper divisors (4593907).

197536109 is an equidigital number, since it uses as much as digits as its factorization.

197536109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4593906.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 197536109 is about 14054.7539644065. The cubic root of 197536109 is about 582.3921309218.

The spelling of 197536109 in words is "one hundred ninety-seven million, five hundred thirty-six thousand, one hundred nine".