1608649 has 8 divisors (see below), whose sum is σ = 1888448. Its totient is φ = 1341360.

The previous prime is 1608637. The next prime is 1608653. The reversal of 1608649 is 9468061.

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 1608649 - 2⁵ = 1608617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1608349) 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, 2847 + ... + 3364.

It is an arithmetic number, because the mean of its divisors is an integer number (236056).

2^1608649 is an apocalyptic number.

It is an amenable number.

1608649 is a deficient number, since it is larger than the sum of its proper divisors (279799).

1608649 is an equidigital number, since it uses as much as digits as its factorization.

1608649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6255.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1608649 is about 1268.3252737370. The cubic root of 1608649 is about 117.1710795007.

The spelling of 1608649 in words is "one million, six hundred eight thousand, six hundred forty-nine".