205299142903 has 2 divisors, whose sum is σ = 205299142904. Its totient is φ = 205299142902.

The previous prime is 205299142891. The next prime is 205299142943. The reversal of 205299142903 is 309241992502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205299142903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205299142943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102649571451 + 102649571452.

It is an arithmetic number, because the mean of its divisors is an integer number (102649571452).

Almost surely, 2^205299142903 is an apocalyptic number.

205299142903 is a deficient number, since it is larger than the sum of its proper divisors (1).

205299142903 is an equidigital number, since it uses as much as digits as its factorization.

205299142903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 205299142903 in words is "two hundred five billion, two hundred ninety-nine million, one hundred forty-two thousand, nine hundred three".