1383689 has 4 divisors (see below), whose sum is σ = 1421124. Its totient is φ = 1346256.

The previous prime is 1383667. The next prime is 1383691. The reversal of 1383689 is 9863831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 846400 + 537289 = 920^2 + 733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1383689 - 2⁸ = 1383433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1383659) 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, 18662 + ... + 18735.

It is an arithmetic number, because the mean of its divisors is an integer number (355281).

2^1383689 is an apocalyptic number.

It is an amenable number.

1383689 is a deficient number, since it is larger than the sum of its proper divisors (37435).

1383689 is an equidigital number, since it uses as much as digits as its factorization.

1383689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37434.

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

The square root of 1383689 is about 1176.3031071964. The cubic root of 1383689 is about 111.4327451397.

The spelling of 1383689 in words is "one million, three hundred eighty-three thousand, six hundred eighty-nine".