1386659 has 2 divisors, whose sum is σ = 1386660. Its totient is φ = 1386658.

The previous prime is 1386643. The next prime is 1386667. The reversal of 1386659 is 9566831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1386659 - 2⁴ = 1386643 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1383659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693329 + 693330.

It is an arithmetic number, because the mean of its divisors is an integer number (693330).

2^1386659 is an apocalyptic number.

1386659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386659 is an equidigital number, since it uses as much as digits as its factorization.

1386659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 1386659 is about 1177.5648602094. The cubic root of 1386659 is about 111.5124159192.

The spelling of 1386659 in words is "one million, three hundred eighty-six thousand, six hundred fifty-nine".