1396789 has 2 divisors, whose sum is σ = 1396790. Its totient is φ = 1396788.

The previous prime is 1396757. The next prime is 1396817. The reversal of 1396789 is 9876931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1368900 + 27889 = 1170^2 + 167^2 .

It is an emirp because it is prime and its reverse (9876931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1396789 - 2⁵ = 1396757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698394 + 698395.

It is an arithmetic number, because the mean of its divisors is an integer number (698395).

2^1396789 is an apocalyptic number.

It is an amenable number.

1396789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396789 is an equidigital number, since it uses as much as digits as its factorization.

1396789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 1396789 is about 1181.8582825364. The cubic root of 1396789 is about 111.7833023045.

The spelling of 1396789 in words is "one million, three hundred ninety-six thousand, seven hundred eighty-nine".