1284231089 has 4 divisors (see below), whose sum is σ = 1296699456. Its totient is φ = 1271762724.

The previous prime is 1284231007. The next prime is 1284231097. The reversal of 1284231089 is 9801324821.

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: 9801324821 = 53 ⋅184930657.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284231089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1284237089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6234029 + ... + 6234234.

It is an arithmetic number, because the mean of its divisors is an integer number (324174864).

Almost surely, 2^1284231089 is an apocalyptic number.

It is an amenable number.

1284231089 is a deficient number, since it is larger than the sum of its proper divisors (12468367).

1284231089 is a wasteful number, since it uses less digits than its factorization.

1284231089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12468366.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 1284231089 is about 35836.1701218197. The cubic root of 1284231089 is about 1086.9620790409.

The spelling of 1284231089 in words is "one billion, two hundred eighty-four million, two hundred thirty-one thousand, eighty-nine".