1129368509 has 4 divisors (see below), whose sum is σ = 1129598460. Its totient is φ = 1129138560.

The previous prime is 1129368491. The next prime is 1129368557. The reversal of 1129368509 is 9058639211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9058639211 = 601 ⋅15072611.

It can be written as a sum of positive squares in 2 ways, for example, as 832495609 + 296872900 = 28853^2 + 17230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129368509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129368509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129368589) 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, 107444 + ... + 117485.

It is an arithmetic number, because the mean of its divisors is an integer number (282399615).

Almost surely, 2^1129368509 is an apocalyptic number.

It is an amenable number.

1129368509 is a deficient number, since it is larger than the sum of its proper divisors (229951).

1129368509 is an equidigital number, since it uses as much as digits as its factorization.

1129368509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229950.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1129368509 is about 33606.0784531608. The cubic root of 1129368509 is about 1041.3863749951.

The spelling of 1129368509 in words is "one billion, one hundred twenty-nine million, three hundred sixty-eight thousand, five hundred nine".