204847391 has 12 divisors (see below), whose sum is σ = 238531320. Its totient is φ = 175407120.

The previous prime is 204847381. The next prime is 204847393. The reversal of 204847391 is 193748402.

It is not a de Polignac number, because 204847391 - 2¹⁴ = 204831007 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 (204847393) 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, 78140 + ... + 80718.

It is an arithmetic number, because the mean of its divisors is an integer number (19877610).

Almost surely, 2^204847391 is an apocalyptic number.

204847391 is a deficient number, since it is larger than the sum of its proper divisors (33683929).

204847391 is a wasteful number, since it uses less digits than its factorization.

204847391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214 (or 4207 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 204847391 is about 14312.4907336215. The cubic root of 204847391 is about 589.4905024053.

The spelling of 204847391 in words is "two hundred four million, eight hundred forty-seven thousand, three hundred ninety-one".