1090309 has 4 divisors (see below), whose sum is σ = 1189440. Its totient is φ = 991180.

The previous prime is 1090303. The next prime is 1090333. The reversal of 1090309 is 9030901.

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: 9030901 = 11 ⋅820991.

It is a cyclic number.

It is not a de Polignac number, because 1090309 - 2⁷ = 1090181 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1090309 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1090309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090303) 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 in 3 ways as a sum of consecutive naturals, for example, 49549 + ... + 49570.

It is an arithmetic number, because the mean of its divisors is an integer number (297360).

2^1090309 is an apocalyptic number.

It is an amenable number.

1090309 is a deficient number, since it is larger than the sum of its proper divisors (99131).

1090309 is an equidigital number, since it uses as much as digits as its factorization.

1090309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99130.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 1090309 is about 1044.1786245657. The cubic root of 1090309 is about 102.9239706626.

The spelling of 1090309 in words is "one million, ninety thousand, three hundred nine".