1150644909 has 4 divisors (see below), whose sum is σ = 1534193216. Its totient is φ = 767096604.

The previous prime is 1150644899. The next prime is 1150644917. The reversal of 1150644909 is 9094460511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9094460511 = 3 ⋅3031486837.

It is not a de Polignac number, because 1150644909 - 2⁵ = 1150644877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1150644809) 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, 191774149 + ... + 191774154.

It is an arithmetic number, because the mean of its divisors is an integer number (383548304).

Almost surely, 2^1150644909 is an apocalyptic number.

It is an amenable number.

1150644909 is a deficient number, since it is larger than the sum of its proper divisors (383548307).

1150644909 is an equidigital number, since it uses as much as digits as its factorization.

1150644909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383548306.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1150644909 is about 33921.1572473582. The cubic root of 1150644909 is about 1047.8853613338.

The spelling of 1150644909 in words is "one billion, one hundred fifty million, six hundred forty-four thousand, nine hundred nine".