204336857 has 2 divisors, whose sum is σ = 204336858. Its totient is φ = 204336856.

The previous prime is 204336833. The next prime is 204336863. The reversal of 204336857 is 758633402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122235136 + 82101721 = 11056^2 + 9061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204336857 is a prime.

It is a super-2 number, since 2×204336857² = 83507102257276898, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204336857.

It is not a weakly prime, because it can be changed into another prime (204336827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102168428 + 102168429.

It is an arithmetic number, because the mean of its divisors is an integer number (102168429).

Almost surely, 2^204336857 is an apocalyptic number.

It is an amenable number.

204336857 is a deficient number, since it is larger than the sum of its proper divisors (1).

204336857 is an equidigital number, since it uses as much as digits as its factorization.

204336857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 204336857 is about 14294.6443467475. The cubic root of 204336857 is about 589.0003728032. Note that the first 3 decimals are identical.

The spelling of 204336857 in words is "two hundred four million, three hundred thirty-six thousand, eight hundred fifty-seven".