205447320773 has 2 divisors, whose sum is σ = 205447320774. Its totient is φ = 205447320772.

The previous prime is 205447320751. The next prime is 205447320787. The reversal of 205447320773 is 377023744502.

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., 191228666209 + 14218654564 = 437297^2 + 119242^2 .

It is a cyclic number.

It is not a de Polignac number, because 205447320773 - 2¹⁴ = 205447304389 is a prime.

It is a super-2 number, since 2×205447320773² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205447320703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102723660386 + 102723660387.

It is an arithmetic number, because the mean of its divisors is an integer number (102723660387).

Almost surely, 2^205447320773 is an apocalyptic number.

It is an amenable number.

205447320773 is a deficient number, since it is larger than the sum of its proper divisors (1).

205447320773 is an equidigital number, since it uses as much as digits as its factorization.

205447320773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 44.

The spelling of 205447320773 in words is "two hundred five billion, four hundred forty-seven million, three hundred twenty thousand, seven hundred seventy-three".