1129273919 has 4 divisors (see below), whose sum is σ = 1141962480. Its totient is φ = 1116585360.

The previous prime is 1129273913. The next prime is 1129273931. The reversal of 1129273919 is 9193729211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9193729211 = 23 ⋅399727357.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129273919 is a prime.

It is a super-2 number, since 2×1129273919² = 2550519168267237122, which contains 22 as substring.

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 1129273919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129273913) 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, 6344147 + ... + 6344324.

It is an arithmetic number, because the mean of its divisors is an integer number (285490620).

Almost surely, 2^1129273919 is an apocalyptic number.

1129273919 is a deficient number, since it is larger than the sum of its proper divisors (12688561).

1129273919 is an equidigital number, since it uses as much as digits as its factorization.

1129273919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12688560.

The product of its digits is 61236, while the sum is 44.

The square root of 1129273919 is about 33604.6710890019. The cubic root of 1129273919 is about 1041.3573004912.

The spelling of 1129273919 in words is "one billion, one hundred twenty-nine million, two hundred seventy-three thousand, nine hundred nineteen".