1604145223 has 4 divisors (see below), whose sum is σ = 1634412168. Its totient is φ = 1573878280.

The previous prime is 1604145209. The next prime is 1604145239. The reversal of 1604145223 is 3225414061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604145223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1604145191 and 1604145200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604148223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15133393 + ... + 15133498.

It is an arithmetic number, because the mean of its divisors is an integer number (408603042).

Almost surely, 2^1604145223 is an apocalyptic number.

1604145223 is a deficient number, since it is larger than the sum of its proper divisors (30266945).

1604145223 is an equidigital number, since it uses as much as digits as its factorization.

1604145223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30266944.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1604145223 is about 40051.7817706029. The cubic root of 1604145223 is about 1170.6162830621.

Adding to 1604145223 its reverse (3225414061), we get a palindrome (4829559284).

The spelling of 1604145223 in words is "one billion, six hundred four million, one hundred forty-five thousand, two hundred twenty-three".