1386839 has 2 divisors, whose sum is σ = 1386840. Its totient is φ = 1386838.

The previous prime is 1386823. The next prime is 1386857. The reversal of 1386839 is 9386831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1386839 - 2⁴ = 1386823 is a prime.

It is a Sophie Germain 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 (1386139) 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, 693419 + 693420.

It is an arithmetic number, because the mean of its divisors is an integer number (693420).

2^1386839 is an apocalyptic number.

1386839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386839 is an equidigital number, since it uses as much as digits as its factorization.

1386839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 1386839 is about 1177.6412866404. The cubic root of 1386839 is about 111.5172407935.

The spelling of 1386839 in words is "one million, three hundred eighty-six thousand, eight hundred thirty-nine".