1089203 has 4 divisors (see below), whose sum is σ = 1109808. Its totient is φ = 1068600.

The previous prime is 1089197. The next prime is 1089217. The reversal of 1089203 is 3029801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1089203 - 2²⁰ = 40627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10223 + ... + 10328.

It is an arithmetic number, because the mean of its divisors is an integer number (277452).

2^1089203 is an apocalyptic number.

1089203 is a deficient number, since it is larger than the sum of its proper divisors (20605).

1089203 is an equidigital number, since it uses as much as digits as its factorization.

1089203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20604.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1089203 is about 1043.6488873180. The cubic root of 1089203 is about 102.8891571605.

The spelling of 1089203 in words is "one million, eighty-nine thousand, two hundred three".