1289393 has 4 divisors (see below), whose sum is σ = 1473600. Its totient is φ = 1105188.

The previous prime is 1289381. The next prime is 1289401. The reversal of 1289393 is 3939821.

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.

It is not a de Polignac number, because 1289393 - 2⁶ = 1289329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1289303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92093 + ... + 92106.

It is an arithmetic number, because the mean of its divisors is an integer number (368400).

2^1289393 is an apocalyptic number.

It is an amenable number.

1289393 is a deficient number, since it is larger than the sum of its proper divisors (184207).

1289393 is an equidigital number, since it uses as much as digits as its factorization.

1289393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184206.

The product of its digits is 11664, while the sum is 35.

The square root of 1289393 is about 1135.5144208684. The cubic root of 1289393 is about 108.8416464430.

The spelling of 1289393 in words is "one million, two hundred eighty-nine thousand, three hundred ninety-three".