1608191 has 4 divisors (see below), whose sum is σ = 1731912. Its totient is φ = 1484472.

The previous prime is 1608133. The next prime is 1608197. The reversal of 1608191 is 1918061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1918061 = 139 ⋅13799.

It is a cyclic number.

It is not a de Polignac number, because 1608191 - 2⁶ = 1608127 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1608191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61841 + ... + 61866.

It is an arithmetic number, because the mean of its divisors is an integer number (432978).

2^1608191 is an apocalyptic number.

1608191 is a deficient number, since it is larger than the sum of its proper divisors (123721).

1608191 is a wasteful number, since it uses less digits than its factorization.

1608191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123720.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1608191 is about 1268.1447078311. The cubic root of 1608191 is about 117.1599584817.

The spelling of 1608191 in words is "one million, six hundred eight thousand, one hundred ninety-one".