1389277 has 2 divisors, whose sum is σ = 1389278. Its totient is φ = 1389276.

The previous prime is 1389259. The next prime is 1389281. The reversal of 1389277 is 7729831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207801 + 181476 = 1099^2 + 426^2 .

It is an emirp because it is prime and its reverse (7729831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389277 - 2⁷ = 1389149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694638 + 694639.

It is an arithmetic number, because the mean of its divisors is an integer number (694639).

2^1389277 is an apocalyptic number.

It is an amenable number.

1389277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389277 is an equidigital number, since it uses as much as digits as its factorization.

1389277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 1389277 is about 1178.6759520750. The cubic root of 1389277 is about 111.5825499538.

The spelling of 1389277 in words is "one million, three hundred eighty-nine thousand, two hundred seventy-seven".