204817077 has 12 divisors (see below), whose sum is σ = 300697644. Its totient is φ = 134305920.

The previous prime is 204817051. The next prime is 204817079. The reversal of 204817077 is 770718402.

It can be written as a sum of positive squares in 2 ways, for example, as 98128836 + 106688241 = 9906^2 + 10329^2 .

It is not a de Polignac number, because 204817077 - 2⁶ = 204817013 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204817079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185988 + ... + 187085.

It is an arithmetic number, because the mean of its divisors is an integer number (25058137).

Almost surely, 2^204817077 is an apocalyptic number.

It is an amenable number.

204817077 is a deficient number, since it is larger than the sum of its proper divisors (95880567).

204817077 is a wasteful number, since it uses less digits than its factorization.

204817077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373140 (or 373137 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 204817077 is about 14311.4316893873. The cubic root of 204817077 is about 589.4614227141.

It can be divided in two parts, 204 and 817077, that added together give a triangular number (817281 = T₁₂₇₈).

The spelling of 204817077 in words is "two hundred four million, eight hundred seventeen thousand, seventy-seven".