204996983 has 4 divisors (see below), whose sum is σ = 210537480. Its totient is φ = 199456488.

The previous prime is 204996959. The next prime is 204996989. The reversal of 204996983 is 389699402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389699402 = 2 ⋅194849701.

It is a cyclic number.

It is not a de Polignac number, because 204996983 - 2¹⁸ = 204734839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204996989) 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, 2770193 + ... + 2770266.

It is an arithmetic number, because the mean of its divisors is an integer number (52634370).

Almost surely, 2^204996983 is an apocalyptic number.

204996983 is a deficient number, since it is larger than the sum of its proper divisors (5540497).

204996983 is an equidigital number, since it uses as much as digits as its factorization.

204996983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540496.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 204996983 is about 14317.7157046786. The cubic root of 204996983 is about 589.6339614066.

The spelling of 204996983 in words is "two hundred four million, nine hundred ninety-six thousand, nine hundred eighty-three".