205287994147 has 2 divisors, whose sum is σ = 205287994148. Its totient is φ = 205287994146.

The previous prime is 205287994117. The next prime is 205287994159. The reversal of 205287994147 is 741499782502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205287994147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205287994091 and 205287994100.

It is not a weakly prime, because it can be changed into another prime (205287994117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102643997073 + 102643997074.

It is an arithmetic number, because the mean of its divisors is an integer number (102643997074).

Almost surely, 2^205287994147 is an apocalyptic number.

205287994147 is a deficient number, since it is larger than the sum of its proper divisors (1).

205287994147 is an equidigital number, since it uses as much as digits as its factorization.

205287994147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 205287994147 in words is "two hundred five billion, two hundred eighty-seven million, nine hundred ninety-four thousand, one hundred forty-seven".