1128999343 has 4 divisors (see below), whose sum is σ = 1129083768. Its totient is φ = 1128914920.

The previous prime is 1128999341. The next prime is 1128999401. The reversal of 1128999343 is 3439998211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1128999343 - 2¹ = 1128999341 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128999341) 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, 17221 + ... + 50542.

It is an arithmetic number, because the mean of its divisors is an integer number (282270942).

Almost surely, 2^1128999343 is an apocalyptic number.

1128999343 is a deficient number, since it is larger than the sum of its proper divisors (84425).

1128999343 is an equidigital number, since it uses as much as digits as its factorization.

1128999343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84424.

The product of its digits is 419904, while the sum is 49.

The square root of 1128999343 is about 33600.5854562089. The cubic root of 1128999343 is about 1041.2728937780.

The spelling of 1128999343 in words is "one billion, one hundred twenty-eight million, nine hundred ninety-nine thousand, three hundred forty-three".