1389023 has 4 divisors (see below), whose sum is σ = 1404720. Its totient is φ = 1373328.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389023 is 3209831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3209831 = 311 ⋅10321.

It is a cyclic number.

It is not a de Polignac number, because 1389023 - 2⁴ = 1389007 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388983 and 1389001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389083) 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, 7715 + ... + 7892.

It is an arithmetic number, because the mean of its divisors is an integer number (351180).

2^1389023 is an apocalyptic number.

1389023 is a deficient number, since it is larger than the sum of its proper divisors (15697).

1389023 is an equidigital number, since it uses as much as digits as its factorization.

1389023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15696.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1389023 is about 1178.5681991298. The cubic root of 1389023 is about 111.5757493673.

The spelling of 1389023 in words is "one million, three hundred eighty-nine thousand, twenty-three".