204461643 has 4 divisors (see below), whose sum is σ = 272615528. Its totient is φ = 136307760.

The previous prime is 204461627. The next prime is 204461657. The reversal of 204461643 is 346164402.

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

It is not a de Polignac number, because 204461643 - 2⁴ = 204461627 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 204461643.

It is not an unprimeable number, because it can be changed into a prime (204461683) 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, 34076938 + ... + 34076943.

It is an arithmetic number, because the mean of its divisors is an integer number (68153882).

Almost surely, 2^204461643 is an apocalyptic number.

204461643 is a deficient number, since it is larger than the sum of its proper divisors (68153885).

204461643 is an equidigital number, since it uses as much as digits as its factorization.

204461643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68153884.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 204461643 is about 14299.0084621277. The cubic root of 204461643 is about 589.1202468273.

The spelling of 204461643 in words is "two hundred four million, four hundred sixty-one thousand, six hundred forty-three".