1705404661 has 2 divisors, whose sum is σ = 1705404662. Its totient is φ = 1705404660.

The previous prime is 1705404637. The next prime is 1705404683. The reversal of 1705404661 is 1664045071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1514688561 + 190716100 = 38919^2 + 13810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1705404661 - 2⁹ = 1705404149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1705404361) 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, 852702330 + 852702331.

It is an arithmetic number, because the mean of its divisors is an integer number (852702331).

Almost surely, 2^1705404661 is an apocalyptic number.

It is an amenable number.

1705404661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705404661 is an equidigital number, since it uses as much as digits as its factorization.

1705404661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1705404661 is about 41296.5453882041. The cubic root of 1705404661 is about 1194.7466327918.

The spelling of 1705404661 in words is "one billion, seven hundred five million, four hundred four thousand, six hundred sixty-one".