204688361 has 2 divisors, whose sum is σ = 204688362. Its totient is φ = 204688360.

The previous prime is 204688343. The next prime is 204688399. The reversal of 204688361 is 163886402.

It is a happy number.

It is an a-pointer prime, because the next prime (204688399) can be obtained adding 204688361 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192654400 + 12033961 = 13880^2 + 3469^2 .

It is a cyclic number.

It is not a de Polignac number, because 204688361 - 2¹⁸ = 204426217 is a prime.

It is not a weakly prime, because it can be changed into another prime (204688301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102344180 + 102344181.

It is an arithmetic number, because the mean of its divisors is an integer number (102344181).

Almost surely, 2^204688361 is an apocalyptic number.

It is an amenable number.

204688361 is a deficient number, since it is larger than the sum of its proper divisors (1).

204688361 is an equidigital number, since it uses as much as digits as its factorization.

204688361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 204688361 is about 14306.9340181606. The cubic root of 204688361 is about 589.3379157339.

The spelling of 204688361 in words is "two hundred four million, six hundred eighty-eight thousand, three hundred sixty-one".