197488609 has 8 divisors (see below), whose sum is σ = 209579400. Its totient is φ = 185450496.

The previous prime is 197488591. The next prime is 197488619. The reversal of 197488609 is 906884791.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60528400 + 136960209 = 7780^2 + 11703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197488609 - 2⁷ = 197488481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197488619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5304 + ... + 20569.

It is an arithmetic number, because the mean of its divisors is an integer number (26197425).

Almost surely, 2^197488609 is an apocalyptic number.

It is an amenable number.

197488609 is a deficient number, since it is larger than the sum of its proper divisors (12090791).

197488609 is a wasteful number, since it uses less digits than its factorization.

197488609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26339.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 197488609 is about 14053.0640431189. The cubic root of 197488609 is about 582.3454460499.

The spelling of 197488609 in words is "one hundred ninety-seven million, four hundred eighty-eight thousand, six hundred nine".