1386909 has 16 divisors (see below), whose sum is σ = 2122240. Its totient is φ = 894240.

The previous prime is 1386901. The next prime is 1386929. The reversal of 1386909 is 9096831.

It is not a de Polignac number, because 1386909 - 2³ = 1386901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386901) 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 in 15 ways as a sum of consecutive naturals, for example, 9 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (132640).

2^1386909 is an apocalyptic number.

It is an amenable number.

1386909 is a deficient number, since it is larger than the sum of its proper divisors (735331).

1386909 is a wasteful number, since it uses less digits than its factorization.

1386909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1386909 is about 1177.6710066907. The cubic root of 1386909 is about 111.5191170208.

Adding to 1386909 its sum of digits (36), we get a triangular number (1386945 = T₁₆₆₅).

The spelling of 1386909 in words is "one million, three hundred eighty-six thousand, nine hundred nine".