1098609 has 8 divisors (see below), whose sum is σ = 1512192. Its totient is φ = 708720.

The previous prime is 1098593. The next prime is 1098613. The reversal of 1098609 is 9068901.

It is a happy number.

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

It is not a de Polignac number, because 1098609 - 2⁴ = 1098593 is a prime.

1098609 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1098609.

It is not an unprimeable number, because it can be changed into a prime (1098649) 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, 5814 + ... + 5999.

It is an arithmetic number, because the mean of its divisors is an integer number (189024).

2^1098609 is an apocalyptic number.

It is an amenable number.

1098609 is a deficient number, since it is larger than the sum of its proper divisors (413583).

1098609 is a wasteful number, since it uses less digits than its factorization.

1098609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11847.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1098609 is about 1048.1455051661. The cubic root of 1098609 is about 103.1844810208.

The spelling of 1098609 in words is "one million, ninety-eight thousand, six hundred nine".