204129901 has 8 divisors (see below), whose sum is σ = 219871520. Its totient is φ = 188888112.

The previous prime is 204129847. The next prime is 204129923. The reversal of 204129901 is 109921402.

It is a happy number.

204129901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204129901 - 2¹⁵ = 204097133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204129901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204129941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124110 + ... + 125743.

It is an arithmetic number, because the mean of its divisors is an integer number (27483940).

Almost surely, 2^204129901 is an apocalyptic number.

It is an amenable number.

204129901 is a deficient number, since it is larger than the sum of its proper divisors (15741619).

204129901 is a wasteful number, since it uses less digits than its factorization.

204129901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249915.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 204129901 is about 14287.4035779774. The cubic root of 204129901 is about 588.8014556176.

The spelling of 204129901 in words is "two hundred four million, one hundred twenty-nine thousand, nine hundred one".