204264891 has 6 divisors (see below), whose sum is σ = 295049300. Its totient is φ = 136176588.

The previous prime is 204264887. The next prime is 204264899. The reversal of 204264891 is 198462402.

204264891 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 648 + 9 + 1 = 666.

It is not a de Polignac number, because 204264891 - 2² = 204264887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204264899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11348041 + ... + 11348058.

Almost surely, 2^204264891 is an apocalyptic number.

204264891 is a deficient number, since it is larger than the sum of its proper divisors (90784409).

204264891 is a wasteful number, since it uses less digits than its factorization.

204264891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22696105 (or 22696102 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 204264891 is about 14292.1268886055. The cubic root of 204264891 is about 588.9312174247.

The spelling of 204264891 in words is "two hundred four million, two hundred sixty-four thousand, eight hundred ninety-one".