1604554213 has 2 divisors, whose sum is σ = 1604554214. Its totient is φ = 1604554212.

The previous prime is 1604554201. The next prime is 1604554241. The reversal of 1604554213 is 3124554061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1597361089 + 7193124 = 39967^2 + 2682^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604554213 - 2¹⁷ = 1604423141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604554283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802277106 + 802277107.

It is an arithmetic number, because the mean of its divisors is an integer number (802277107).

Almost surely, 2^1604554213 is an apocalyptic number.

It is an amenable number.

1604554213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604554213 is an equidigital number, since it uses as much as digits as its factorization.

1604554213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1604554213 is about 40056.8872105659. The cubic root of 1604554213 is about 1170.7157606870.

The spelling of 1604554213 in words is "one billion, six hundred four million, five hundred fifty-four thousand, two hundred thirteen".