204961897 has 4 divisors (see below), whose sum is σ = 234242176. Its totient is φ = 175681620.

The previous prime is 204961853. The next prime is 204961903. The reversal of 204961897 is 798169402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204961897 - 2²⁷ = 70744169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204961837) 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, 14640129 + ... + 14640142.

It is an arithmetic number, because the mean of its divisors is an integer number (58560544).

Almost surely, 2^204961897 is an apocalyptic number.

It is an amenable number.

204961897 is a deficient number, since it is larger than the sum of its proper divisors (29280279).

204961897 is an equidigital number, since it uses as much as digits as its factorization.

204961897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29280278.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 204961897 is about 14316.4903869629. The cubic root of 204961897 is about 589.6003201350.

The spelling of 204961897 in words is "two hundred four million, nine hundred sixty-one thousand, eight hundred ninety-seven".