1129284643 has 4 divisors (see below), whose sum is σ = 1147797568. Its totient is φ = 1110771720.

The previous prime is 1129284631. The next prime is 1129284671. The reversal of 1129284643 is 3464829211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3464829211 = 17 ⋅203813483.

It is a cyclic number.

It is not a de Polignac number, because 1129284643 - 2¹³ = 1129276451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1129284596 and 1129284605.

It is not an unprimeable number, because it can be changed into a prime (1129284683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9256371 + ... + 9256492.

It is an arithmetic number, because the mean of its divisors is an integer number (286949392).

Almost surely, 2^1129284643 is an apocalyptic number.

1129284643 is a deficient number, since it is larger than the sum of its proper divisors (18512925).

1129284643 is an equidigital number, since it uses as much as digits as its factorization.

1129284643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18512924.

The product of its digits is 82944, while the sum is 40.

The square root of 1129284643 is about 33604.8306497741. The cubic root of 1129284643 is about 1041.3605968513.

The spelling of 1129284643 in words is "one billion, one hundred twenty-nine million, two hundred eighty-four thousand, six hundred forty-three".