197409 has 8 divisors (see below), whose sum is σ = 274752. Its totient is φ = 125840.

The previous prime is 197389. The next prime is 197419. The reversal of 197409 is 904791.

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 197409 - 2¹⁷ = 66337 is a prime.

It is a Curzon number.

197409 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 197409.

It is not an unprimeable number, because it can be changed into a prime (197419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1362 + ... + 1499.

It is an arithmetic number, because the mean of its divisors is an integer number (34344).

2¹⁹⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

197409 is a deficient number, since it is larger than the sum of its proper divisors (77343).

197409 is a wasteful number, since it uses less digits than its factorization.

197409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 197409 is about 444.3073260706. The cubic root of 197409 is about 58.2267186398.

It can be divided in two parts, 197 and 409, that added together give a palindrome (606).

The spelling of 197409 in words is "one hundred ninety-seven thousand, four hundred nine".