1198609 has 2 divisors, whose sum is σ = 1198610. Its totient is φ = 1198608.

The previous prime is 1198607. The next prime is 1198621. The reversal of 1198609 is 9068911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1096209 + 102400 = 1047^2 + 320^2 .

It is an emirp because it is prime and its reverse (9068911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1198609 - 2¹ = 1198607 is a prime.

Together with 1198607, it forms a pair of twin primes.

1198609 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1198607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599304 + 599305.

It is an arithmetic number, because the mean of its divisors is an integer number (599305).

2^1198609 is an apocalyptic number.

It is an amenable number.

1198609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198609 is an equidigital number, since it uses as much as digits as its factorization.

1198609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1198609 is about 1094.8100291831. The cubic root of 1198609 is about 106.2247810965.

The spelling of 1198609 in words is "one million, one hundred ninety-eight thousand, six hundred nine".