204787139 has 2 divisors, whose sum is σ = 204787140. Its totient is φ = 204787138.

The previous prime is 204787127. The next prime is 204787153. The reversal of 204787139 is 931787402.

204787139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204787139 - 2⁴ = 204787123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204787096 and 204787105.

It is not a weakly prime, because it can be changed into another prime (204787159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102393569 + 102393570.

It is an arithmetic number, because the mean of its divisors is an integer number (102393570).

Almost surely, 2^204787139 is an apocalyptic number.

204787139 is a deficient number, since it is larger than the sum of its proper divisors (1).

204787139 is an equidigital number, since it uses as much as digits as its factorization.

204787139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 204787139 is about 14310.3857040962. The cubic root of 204787139 is about 589.4327008968.

The spelling of 204787139 in words is "two hundred four million, seven hundred eighty-seven thousand, one hundred thirty-nine".