1604421333 has 6 divisors (see below), whose sum is σ = 2317497494. Its totient is φ = 1069614216.

The previous prime is 1604421319. The next prime is 1604421391. The reversal of 1604421333 is 3331244061.

1604421333 is a `hidden beast` number, since 1 + 604 + 4 + 21 + 3 + 33 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1582687089 + 21734244 = 39783^2 + 4662^2 .

It is not a de Polignac number, because 1604421333 - 2¹⁰ = 1604420309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1604421297 and 1604421306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604423333) 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 5 ways as a sum of consecutive naturals, for example, 89134510 + ... + 89134527.

Almost surely, 2^1604421333 is an apocalyptic number.

It is an amenable number.

1604421333 is a deficient number, since it is larger than the sum of its proper divisors (713076161).

1604421333 is a wasteful number, since it uses less digits than its factorization.

1604421333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178269043 (or 178269040 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 1604421333 is about 40055.2285351114. The cubic root of 1604421333 is about 1170.6834424677.

Adding to 1604421333 its reverse (3331244061), we get a palindrome (4935665394).

The spelling of 1604421333 in words is "one billion, six hundred four million, four hundred twenty-one thousand, three hundred thirty-three".