1608988409 has 8 divisors (see below), whose sum is σ = 1947011328. Its totient is φ = 1298007360.

The previous prime is 1608988331. The next prime is 1608988427. The reversal of 1608988409 is 9048898061.

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 1608988409 - 2²⁰ = 1607939833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1608988429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6760337 + ... + 6760574.

It is an arithmetic number, because the mean of its divisors is an integer number (243376416).

Almost surely, 2^1608988409 is an apocalyptic number.

It is an amenable number.

1608988409 is a deficient number, since it is larger than the sum of its proper divisors (338022919).

1608988409 is a wasteful number, since it uses less digits than its factorization.

1608988409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13520935.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 1608988409 is about 40112.1977582879. The cubic root of 1608988409 is about 1171.7931956683.

The spelling of 1608988409 in words is "one billion, six hundred eight million, nine hundred eighty-eight thousand, four hundred nine".