204488434789 has 2 divisors, whose sum is σ = 204488434790. Its totient is φ = 204488434788.

The previous prime is 204488434783. The next prime is 204488434793. The reversal of 204488434789 is 987434884402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196027562500 + 8460872289 = 442750^2 + 91983^2 .

It is a cyclic number.

It is not a de Polignac number, because 204488434789 - 2⁵ = 204488434757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204488434783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102244217394 + 102244217395.

It is an arithmetic number, because the mean of its divisors is an integer number (102244217395).

Almost surely, 2^204488434789 is an apocalyptic number.

It is an amenable number.

204488434789 is a deficient number, since it is larger than the sum of its proper divisors (1).

204488434789 is an equidigital number, since it uses as much as digits as its factorization.

204488434789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49545216, while the sum is 61.

The spelling of 204488434789 in words is "two hundred four billion, four hundred eighty-eight million, four hundred thirty-four thousand, seven hundred eighty-nine".