205139299 has 2 divisors, whose sum is σ = 205139300. Its totient is φ = 205139298.

The previous prime is 205139287. The next prime is 205139329. The reversal of 205139299 is 992931502.

205139299 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 205139299 - 2¹³ = 205131107 is a prime.

It is a super-2 number, since 2×205139299² = 84164263988422802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205139269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102569649 + 102569650.

It is an arithmetic number, because the mean of its divisors is an integer number (102569650).

Almost surely, 2^205139299 is an apocalyptic number.

205139299 is a deficient number, since it is larger than the sum of its proper divisors (1).

205139299 is an equidigital number, since it uses as much as digits as its factorization.

205139299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 205139299 is about 14322.6847692742. The cubic root of 205139299 is about 589.7703779437.

The spelling of 205139299 in words is "two hundred five million, one hundred thirty-nine thousand, two hundred ninety-nine".