1608889 has 4 divisors (see below), whose sum is σ = 1615140. Its totient is φ = 1602640.

The previous prime is 1608883. The next prime is 1608911. The reversal of 1608889 is 9888061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9888061 = 67 ⋅147583.

It can be written as a sum of positive squares in 2 ways, for example, as 71289 + 1537600 = 267^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1608889 - 2¹¹ = 1606841 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1608883) 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, 2722 + ... + 3259.

It is an arithmetic number, because the mean of its divisors is an integer number (403785).

2^1608889 is an apocalyptic number.

It is an amenable number.

1608889 is a deficient number, since it is larger than the sum of its proper divisors (6251).

1608889 is an equidigital number, since it uses as much as digits as its factorization.

1608889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6250.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1608889 is about 1268.4198831617. The cubic root of 1608889 is about 117.1769062661.

The spelling of 1608889 in words is "one million, six hundred eight thousand, eight hundred eighty-nine".