1289703423 has 4 divisors (see below), whose sum is σ = 1719604568. Its totient is φ = 859802280.

The previous prime is 1289703407. The next prime is 1289703439. The reversal of 1289703423 is 3243079821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3243079821 = 3 ⋅1081026607.

It is an interprime number because it is at equal distance from previous prime (1289703407) and next prime (1289703439).

It is not a de Polignac number, because 1289703423 - 2⁴ = 1289703407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289723423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214950568 + ... + 214950573.

It is an arithmetic number, because the mean of its divisors is an integer number (429901142).

Almost surely, 2^1289703423 is an apocalyptic number.

1289703423 is a deficient number, since it is larger than the sum of its proper divisors (429901145).

1289703423 is an equidigital number, since it uses as much as digits as its factorization.

1289703423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429901144.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 1289703423 is about 35912.4410615597. The cubic root of 1289703423 is about 1088.5038033029.

The spelling of 1289703423 in words is "one billion, two hundred eighty-nine million, seven hundred three thousand, four hundred twenty-three".