1083509 has 4 divisors (see below), whose sum is σ = 1238304. Its totient is φ = 928716.

The previous prime is 1083497. The next prime is 1083517. The reversal of 1083509 is 9053801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9053801 = 181 ⋅50021.

It is a cyclic number.

It is not a de Polignac number, because 1083509 - 2⁸ = 1083253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1083559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77387 + ... + 77400.

It is an arithmetic number, because the mean of its divisors is an integer number (309576).

2^1083509 is an apocalyptic number.

It is an amenable number.

1083509 is a deficient number, since it is larger than the sum of its proper divisors (154795).

1083509 is an equidigital number, since it uses as much as digits as its factorization.

1083509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154794.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1083509 is about 1040.9173838495. The cubic root of 1083509 is about 102.7095534455.

The spelling of 1083509 in words is "one million, eighty-three thousand, five hundred nine".