1386889 has 4 divisors (see below), whose sum is σ = 1585024. Its totient is φ = 1188756.

The previous prime is 1386883. The next prime is 1386901. The reversal of 1386889 is 9886831.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9886831 = 2081 ⋅4751.

It is a cyclic number.

It is not a de Polignac number, because 1386889 - 2³ = 1386881 is a prime.

It is a super-2 number, since 2×1386889² = 3846922196642, which contains 22 as substring.

1386889 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99057 + ... + 99070.

It is an arithmetic number, because the mean of its divisors is an integer number (396256).

2^1386889 is an apocalyptic number.

It is an amenable number.

1386889 is a deficient number, since it is larger than the sum of its proper divisors (198135).

1386889 is an equidigital number, since it uses as much as digits as its factorization.

1386889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198134.

The product of its digits is 82944, while the sum is 43.

The square root of 1386889 is about 1177.6625153243. The cubic root of 1386889 is about 111.5185809623.

The spelling of 1386889 in words is "one million, three hundred eighty-six thousand, eight hundred eighty-nine".