1389623 has 2 divisors, whose sum is σ = 1389624. Its totient is φ = 1389622.

The previous prime is 1389589. The next prime is 1389629. The reversal of 1389623 is 3269831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1389623 - 2⁶ = 1389559 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1389623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389629) 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 as a sum of consecutive naturals, namely, 694811 + 694812.

It is an arithmetic number, because the mean of its divisors is an integer number (694812).

2^1389623 is an apocalyptic number.

1389623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389623 is an equidigital number, since it uses as much as digits as its factorization.

1389623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 1389623 is about 1178.8227177994. The cubic root of 1389623 is about 111.5918124113.

The spelling of 1389623 in words is "one million, three hundred eighty-nine thousand, six hundred twenty-three".