204021329 has 2 divisors, whose sum is σ = 204021330. Its totient is φ = 204021328.

The previous prime is 204021317. The next prime is 204021347. The reversal of 204021329 is 923120402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157126225 + 46895104 = 12535^2 + 6848^2 .

It is a cyclic number.

It is not a de Polignac number, because 204021329 - 2²⁰ = 202972753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204021229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102010664 + 102010665.

It is an arithmetic number, because the mean of its divisors is an integer number (102010665).

Almost surely, 2^204021329 is an apocalyptic number.

It is an amenable number.

204021329 is a deficient number, since it is larger than the sum of its proper divisors (1).

204021329 is an equidigital number, since it uses as much as digits as its factorization.

204021329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 204021329 is about 14283.6035019179. The cubic root of 204021329 is about 588.6970471200.

The spelling of 204021329 in words is "two hundred four million, twenty-one thousand, three hundred twenty-nine".