205355102987 has 2 divisors, whose sum is σ = 205355102988. Its totient is φ = 205355102986.

The previous prime is 205355102893. The next prime is 205355103001. The reversal of 205355102987 is 789201553502.

205355102987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205355102987 - 2¹⁶ = 205355037451 is a prime.

It is not a weakly prime, because it can be changed into another prime (205355104987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102677551493 + 102677551494.

It is an arithmetic number, because the mean of its divisors is an integer number (102677551494).

Almost surely, 2^205355102987 is an apocalyptic number.

205355102987 is a deficient number, since it is larger than the sum of its proper divisors (1).

205355102987 is an equidigital number, since it uses as much as digits as its factorization.

205355102987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 205355102987 in words is "two hundred five billion, three hundred fifty-five million, one hundred two thousand, nine hundred eighty-seven".