204922891 has 8 divisors (see below), whose sum is σ = 206072640. Its totient is φ = 203777088.

The previous prime is 204922859. The next prime is 204922897. The reversal of 204922891 is 198229402.

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 204922891 - 2⁵ = 204922859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204922891.

It is not an unprimeable number, because it can be changed into a prime (204922897) 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, 186255 + ... + 187351.

It is an arithmetic number, because the mean of its divisors is an integer number (25759080).

Almost surely, 2^204922891 is an apocalyptic number.

204922891 is a deficient number, since it is larger than the sum of its proper divisors (1149749).

204922891 is a wasteful number, since it uses less digits than its factorization.

204922891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 204922891 is about 14315.1280469299. The cubic root of 204922891 is about 589.5629157695.

The spelling of 204922891 in words is "two hundred four million, nine hundred twenty-two thousand, eight hundred ninety-one".