204740091 has 12 divisors (see below), whose sum is σ = 297064768. Its totient is φ = 135879984.

The previous prime is 204740069. The next prime is 204740093. The reversal of 204740091 is 190047402.

It is a happy number.

It is not a de Polignac number, because 204740091 - 2⁵ = 204740059 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (204740093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49000 + ... + 53013.

Almost surely, 2^204740091 is an apocalyptic number.

204740091 is a deficient number, since it is larger than the sum of its proper divisors (92324677).

204740091 is a wasteful number, since it uses less digits than its factorization.

204740091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102242 (or 102239 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 204740091 is about 14308.7417685833. The cubic root of 204740091 is about 589.3875584889.

Adding to 204740091 its reverse (190047402), we get a palindrome (394787493).

The spelling of 204740091 in words is "two hundred four million, seven hundred forty thousand, ninety-one".