204042389 has 2 divisors, whose sum is σ = 204042390. Its totient is φ = 204042388.

The previous prime is 204042343. The next prime is 204042431. The reversal of 204042389 is 983240402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202578289 + 1464100 = 14233^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 204042389 - 2¹⁶ = 203976853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204042689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102021194 + 102021195.

It is an arithmetic number, because the mean of its divisors is an integer number (102021195).

Almost surely, 2^204042389 is an apocalyptic number.

It is an amenable number.

204042389 is a deficient number, since it is larger than the sum of its proper divisors (1).

204042389 is an equidigital number, since it uses as much as digits as its factorization.

204042389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 204042389 is about 14284.3406918205. The cubic root of 204042389 is about 588.7173024095.

The spelling of 204042389 in words is "two hundred four million, forty-two thousand, three hundred eighty-nine".