1705205081 has 2 divisors, whose sum is σ = 1705205082. Its totient is φ = 1705205080.

The previous prime is 1705205071. The next prime is 1705205101. The reversal of 1705205081 is 1805025071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1496142400 + 209062681 = 38680^2 + 14459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1705205081 is a prime.

It is a super-2 number, since 2×1705205081² = 5815448736536433122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1705205071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852602540 + 852602541.

It is an arithmetic number, because the mean of its divisors is an integer number (852602541).

Almost surely, 2^1705205081 is an apocalyptic number.

It is an amenable number.

1705205081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705205081 is an equidigital number, since it uses as much as digits as its factorization.

1705205081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 1705205081 is about 41294.1288926162. The cubic root of 1705205081 is about 1194.7000247265.

The spelling of 1705205081 in words is "one billion, seven hundred five million, two hundred five thousand, eighty-one".