1608399 has 24 divisors (see below), whose sum is σ = 2555280. Its totient is φ = 968832.

The previous prime is 1608379. The next prime is 1608401. The reversal of 1608399 is 9938061.

It is not a de Polignac number, because 1608399 - 2¹⁵ = 1575631 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608349) 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 23 ways as a sum of consecutive naturals, for example, 6787 + ... + 7019.

It is an arithmetic number, because the mean of its divisors is an integer number (106470).

2^1608399 is an apocalyptic number.

1608399 is a deficient number, since it is larger than the sum of its proper divisors (946881).

1608399 is a wasteful number, since it uses less digits than its factorization.

1608399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1608399 is about 1268.2267147478. The cubic root of 1608399 is about 117.1650093372.

It can be divided in two parts, 160839 and 9, that multiplied together give a triangular number (1447551 = T₁₇₀₁).

The spelling of 1608399 in words is "one million, six hundred eight thousand, three hundred ninety-nine".