1129445209 has 8 divisors (see below), whose sum is σ = 1146742272. Its totient is φ = 1112186880.

The previous prime is 1129445183. The next prime is 1129445221. The reversal of 1129445209 is 9025449211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1129445209 - 2⁹ = 1129444697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129445299) 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 7 ways as a sum of consecutive naturals, for example, 52057 + ... + 70489.

It is an arithmetic number, because the mean of its divisors is an integer number (143342784).

Almost surely, 2^1129445209 is an apocalyptic number.

It is an amenable number.

1129445209 is a deficient number, since it is larger than the sum of its proper divisors (17297063).

1129445209 is an equidigital number, since it uses as much as digits as its factorization.

1129445209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19367.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1129445209 is about 33607.2195963903. The cubic root of 1129445209 is about 1041.4099493868.

The spelling of 1129445209 in words is "one billion, one hundred twenty-nine million, four hundred forty-five thousand, two hundred nine".