1889609 has 8 divisors (see below), whose sum is σ = 1949832. Its totient is φ = 1830400.

The previous prime is 1889603. The next prime is 1889617. The reversal of 1889609 is 9069881.

It can be written as a sum of positive squares in 4 ways, for example, as 883600 + 1006009 = 940^2 + 1003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1889609 - 2¹⁶ = 1824073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1889603) 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 7 ways as a sum of consecutive naturals, for example, 5177 + ... + 5529.

It is an arithmetic number, because the mean of its divisors is an integer number (243729).

2^1889609 is an apocalyptic number.

It is an amenable number.

1889609 is a deficient number, since it is larger than the sum of its proper divisors (60223).

1889609 is a wasteful number, since it uses less digits than its factorization.

1889609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1889609 is about 1374.6304958061. The cubic root of 1889609 is about 123.6300323610.

Subtracting from 1889609 its sum of digits (41), we obtain a 5-th power (1889568 = 18⁵).

The spelling of 1889609 in words is "one million, eight hundred eighty-nine thousand, six hundred nine".