1150809409 has 4 divisors (see below), whose sum is σ = 1181912404. Its totient is φ = 1119706416.

The previous prime is 1150809389. The next prime is 1150809433. The reversal of 1150809409 is 9049080511.

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 945747009 + 205062400 = 30753^2 + 14320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1150809409 - 2⁵ = 1150809377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 31102957 = 1150809409 / (1 + 1 + 5 + 0 + 8 + 0 + 9 + 4 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1150801409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15551442 + ... + 15551515.

It is an arithmetic number, because the mean of its divisors is an integer number (295478101).

Almost surely, 2^1150809409 is an apocalyptic number.

It is an amenable number.

1150809409 is a deficient number, since it is larger than the sum of its proper divisors (31102995).

1150809409 is an equidigital number, since it uses as much as digits as its factorization.

1150809409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31102994.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 1150809409 is about 33923.5819010906. The cubic root of 1150809409 is about 1047.9352953394.

The spelling of 1150809409 in words is "one billion, one hundred fifty million, eight hundred nine thousand, four hundred nine".