1604331473 has 4 divisors (see below), whose sum is σ = 1605724068. Its totient is φ = 1602938880.

The previous prime is 1604331413. The next prime is 1604331479. The reversal of 1604331473 is 3741334061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1439671249 + 164660224 = 37943^2 + 12832^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604331473 - 2¹⁶ = 1604265937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604331479) 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, 694568 + ... + 696873.

It is an arithmetic number, because the mean of its divisors is an integer number (401431017).

Almost surely, 2^1604331473 is an apocalyptic number.

It is an amenable number.

1604331473 is a deficient number, since it is larger than the sum of its proper divisors (1392595).

1604331473 is a wasteful number, since it uses less digits than its factorization.

1604331473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392594.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 1604331473 is about 40054.1068181529. The cubic root of 1604331473 is about 1170.6615862849.

The spelling of 1604331473 in words is "one billion, six hundred four million, three hundred thirty-one thousand, four hundred seventy-three".