1153331209 has 4 divisors (see below), whose sum is σ = 1172238340. Its totient is φ = 1134424080.

The previous prime is 1153331203. The next prime is 1153331227. The reversal of 1153331209 is 9021333511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 154455184 + 998876025 = 12428^2 + 31605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153331209 - 2⁵ = 1153331177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153331203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9453474 + ... + 9453595.

It is an arithmetic number, because the mean of its divisors is an integer number (293059585).

Almost surely, 2^1153331209 is an apocalyptic number.

It is an amenable number.

1153331209 is a deficient number, since it is larger than the sum of its proper divisors (18907131).

1153331209 is an equidigital number, since it uses as much as digits as its factorization.

1153331209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18907130.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 1153331209 is about 33960.7303955613. The cubic root of 1153331209 is about 1048.7001932816.

The spelling of 1153331209 in words is "one billion, one hundred fifty-three million, three hundred thirty-one thousand, two hundred nine".