1152208809 has 12 divisors (see below), whose sum is σ = 1691586052. Its totient is φ = 755546400.

The previous prime is 1152208801. The next prime is 1152208819. The reversal of 1152208809 is 9088022511.

It can be written as a sum of positive squares in 2 ways, for example, as 309584025 + 842624784 = 17595^2 + 29028^2 .

It is not a de Polignac number, because 1152208809 - 2³ = 1152208801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1152208801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1048822 + ... + 1049919.

Almost surely, 2^1152208809 is an apocalyptic number.

It is an amenable number.

1152208809 is a deficient number, since it is larger than the sum of its proper divisors (539377243).

1152208809 is a wasteful number, since it uses less digits than its factorization.

1152208809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098808 (or 2098805 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1152208809 is about 33944.2014046582. The cubic root of 1152208809 is about 1048.3598911708.

The spelling of 1152208809 in words is "one billion, one hundred fifty-two million, two hundred eight thousand, eight hundred nine".