205313069077 has 2 divisors, whose sum is σ = 205313069078. Its totient is φ = 205313069076.

The previous prime is 205313069033. The next prime is 205313069083. The reversal of 205313069077 is 770960313502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156049490961 + 49263578116 = 395031^2 + 221954^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205313069077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205313069677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102656534538 + 102656534539.

It is an arithmetic number, because the mean of its divisors is an integer number (102656534539).

Almost surely, 2^205313069077 is an apocalyptic number.

It is an amenable number.

205313069077 is a deficient number, since it is larger than the sum of its proper divisors (1).

205313069077 is an equidigital number, since it uses as much as digits as its factorization.

205313069077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 205313069077 in words is "two hundred five billion, three hundred thirteen million, sixty-nine thousand, seventy-seven".