1705220005 has 8 divisors (see below), whose sum is σ = 2057570424. Its totient is φ = 1356638400.

The previous prime is 1705219973. The next prime is 1705220009. The reversal of 1705220005 is 5000225071.

It can be written as a sum of positive squares in 4 ways, for example, as 252619236 + 1452600769 = 15894^2 + 38113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1705220005 - 2⁵ = 1705219973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1705220009) 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 in 7 ways as a sum of consecutive naturals, for example, 941206 + ... + 943015.

It is an arithmetic number, because the mean of its divisors is an integer number (257196303).

Almost surely, 2^1705220005 is an apocalyptic number.

It is an amenable number.

1705220005 is a deficient number, since it is larger than the sum of its proper divisors (352350419).

1705220005 is a wasteful number, since it uses less digits than its factorization.

1705220005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884407.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 1705220005 is about 41294.3095958753. The cubic root of 1705220005 is about 1194.7035100651.

Adding to 1705220005 its reverse (5000225071), we get a palindrome (6705445076).

The spelling of 1705220005 in words is "one billion, seven hundred five million, two hundred twenty thousand, five".