1090320209 has 4 divisors (see below), whose sum is σ = 1189440240. Its totient is φ = 991200180.

The previous prime is 1090320193. The next prime is 1090320229. The reversal of 1090320209 is 9020230901.

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.

It is a cyclic number.

It is not a de Polignac number, because 1090320209 - 2⁴ = 1090320193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090320229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49559999 + ... + 49560020.

It is an arithmetic number, because the mean of its divisors is an integer number (297360060).

Almost surely, 2^1090320209 is an apocalyptic number.

It is an amenable number.

1090320209 is a deficient number, since it is larger than the sum of its proper divisors (99120031).

1090320209 is an equidigital number, since it uses as much as digits as its factorization.

1090320209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99120030.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1090320209 is about 33019.9971078133. The cubic root of 1090320209 is about 1029.2432336711.

The spelling of 1090320209 in words is "one billion, ninety million, three hundred twenty thousand, two hundred nine".