197609 has 2 divisors, whose sum is σ = 197610. Its totient is φ = 197608.

The previous prime is 197599. The next prime is 197621. The reversal of 197609 is 906791.

197609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157609 + 40000 = 397^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 197609 - 2¹² = 193513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98804 + 98805.

It is an arithmetic number, because the mean of its divisors is an integer number (98805).

2¹⁹⁷⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

197609 is a deficient number, since it is larger than the sum of its proper divisors (1).

197609 is an equidigital number, since it uses as much as digits as its factorization.

197609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 197609 is about 444.5323385312. The cubic root of 197609 is about 58.2463756517.

The spelling of 197609 in words is "one hundred ninety-seven thousand, six hundred nine".