204163129 has 4 divisors (see below), whose sum is σ = 204696576. Its totient is φ = 203629684.

The previous prime is 204163123. The next prime is 204163171. The reversal of 204163129 is 921361402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204163129 - 2¹¹ = 204161081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204163097 and 204163106.

It is not an unprimeable number, because it can be changed into a prime (204163123) 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, 266149 + ... + 266914.

It is an arithmetic number, because the mean of its divisors is an integer number (51174144).

Almost surely, 2^204163129 is an apocalyptic number.

It is an amenable number.

204163129 is a deficient number, since it is larger than the sum of its proper divisors (533447).

204163129 is an equidigital number, since it uses as much as digits as its factorization.

204163129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533446.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 204163129 is about 14288.5663731530. The cubic root of 204163129 is about 588.8334019962.

The spelling of 204163129 in words is "two hundred four million, one hundred sixty-three thousand, one hundred twenty-nine".