1604489329 has 4 divisors (see below), whose sum is σ = 1604576484. Its totient is φ = 1604402176.

The previous prime is 1604489297. The next prime is 1604489339. The reversal of 1604489329 is 9239844061.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 664453729 + 940035600 = 25777^2 + 30660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604489329 - 2⁵ = 1604489297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604489339) 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, 3952 + ... + 56785.

It is an arithmetic number, because the mean of its divisors is an integer number (401144121).

Almost surely, 2^1604489329 is an apocalyptic number.

It is an amenable number.

1604489329 is a deficient number, since it is larger than the sum of its proper divisors (87155).

1604489329 is an equidigital number, since it uses as much as digits as its factorization.

1604489329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87154.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 1604489329 is about 40056.0773041994. The cubic root of 1604489329 is about 1170.6999802406.

The spelling of 1604489329 in words is "one billion, six hundred four million, four hundred eighty-nine thousand, three hundred twenty-nine".