204115949 has 8 divisors (see below), whose sum is σ = 211683000. Its totient is φ = 196584192.

The previous prime is 204115913. The next prime is 204115973. The reversal of 204115949 is 949511402.

It can be written as a sum of positive squares in 4 ways, for example, as 69973225 + 134142724 = 8365^2 + 11582^2 .

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 204115949 - 2²⁰ = 203067373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204115909) 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, 3257 + ... + 20465.

It is an arithmetic number, because the mean of its divisors is an integer number (26460375).

Almost surely, 2^204115949 is an apocalyptic number.

204115949 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

204115949 is a deficient number, since it is larger than the sum of its proper divisors (7567051).

204115949 is a wasteful number, since it uses less digits than its factorization.

204115949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17647.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 204115949 is about 14286.9153073713. The cubic root of 204115949 is about 588.7880407201.

The spelling of 204115949 in words is "two hundred four million, one hundred fifteen thousand, nine hundred forty-nine".