1389473 has 2 divisors, whose sum is σ = 1389474. Its totient is φ = 1389472.

The previous prime is 1389469. The next prime is 1389481. The reversal of 1389473 is 3749831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 238144 = 1073^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389473 - 2² = 1389469 is a prime.

It is not a weakly prime, because it can be changed into another prime (1389403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694736 + 694737.

It is an arithmetic number, because the mean of its divisors is an integer number (694737).

2^1389473 is an apocalyptic number.

It is an amenable number.

1389473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389473 is an equidigital number, since it uses as much as digits as its factorization.

1389473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 1389473 is about 1178.7590932841. The cubic root of 1389473 is about 111.5877970839.

The spelling of 1389473 in words is "one million, three hundred eighty-nine thousand, four hundred seventy-three".