197404009 has 8 divisors (see below), whose sum is σ = 224713152. Its totient is φ = 171655440.

The previous prime is 197404007. The next prime is 197404019. The reversal of 197404009 is 900404791.

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

It is not a de Polignac number, because 197404009 - 2¹ = 197404007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197404003) 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 7 ways as a sum of consecutive naturals, for example, 389874 + ... + 390379.

It is an arithmetic number, because the mean of its divisors is an integer number (28089144).

Almost surely, 2^197404009 is an apocalyptic number.

It is an amenable number.

197404009 is a deficient number, since it is larger than the sum of its proper divisors (27309143).

197404009 is a wasteful number, since it uses less digits than its factorization.

197404009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780287.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 197404009 is about 14050.0537009650. The cubic root of 197404009 is about 582.2622792931.

The spelling of 197404009 in words is "one hundred ninety-seven million, four hundred four thousand, nine".