204861291 has 4 divisors (see below), whose sum is σ = 273148392. Its totient is φ = 136574192.

The previous prime is 204861269. The next prime is 204861311. The reversal of 204861291 is 192168402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204861291 - 2¹⁴ = 204844907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204861221) 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, 34143546 + ... + 34143551.

It is an arithmetic number, because the mean of its divisors is an integer number (68287098).

Almost surely, 2^204861291 is an apocalyptic number.

204861291 is a deficient number, since it is larger than the sum of its proper divisors (68287101).

204861291 is an equidigital number, since it uses as much as digits as its factorization.

204861291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68287100.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 204861291 is about 14312.9763152183. The cubic root of 204861291 is about 589.5038354734.

The spelling of 204861291 in words is "two hundred four million, eight hundred sixty-one thousand, two hundred ninety-one".