1386389 has 4 divisors (see below), whose sum is σ = 1389024. Its totient is φ = 1383756.

The previous prime is 1386383. The next prime is 1386419. The reversal of 1386389 is 9836831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1386389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386383) 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 3 ways as a sum of consecutive naturals, for example, 227 + ... + 1680.

It is an arithmetic number, because the mean of its divisors is an integer number (347256).

2^1386389 is an apocalyptic number.

It is an amenable number.

1386389 is a deficient number, since it is larger than the sum of its proper divisors (2635).

1386389 is an equidigital number, since it uses as much as digits as its factorization.

1386389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634.

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

The square root of 1386389 is about 1177.4502112616. The cubic root of 1386389 is about 111.5051778247.

The spelling of 1386389 in words is "one million, three hundred eighty-six thousand, three hundred eighty-nine".