1722116705 has 4 divisors (see below), whose sum is σ = 2066540052. Its totient is φ = 1377693360.

The previous prime is 1722116689. The next prime is 1722116713. The reversal of 1722116705 is 5076112271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5076112271 = 4813 ⋅1054667.

It can be written as a sum of positive squares in 2 ways, for example, as 1325469649 + 396647056 = 36407^2 + 19916^2 .

It is not a de Polignac number, because 1722116705 - 2⁴ = 1722116689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172211666 + ... + 172211675.

It is an arithmetic number, because the mean of its divisors is an integer number (516635013).

Almost surely, 2^1722116705 is an apocalyptic number.

It is an amenable number.

1722116705 is a deficient number, since it is larger than the sum of its proper divisors (344423347).

1722116705 is an equidigital number, since it uses as much as digits as its factorization.

1722116705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344423346.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 1722116705 is about 41498.3940050696. The cubic root of 1722116705 is about 1198.6365776437.

Adding to 1722116705 its reverse (5076112271), we get a palindrome (6798228976).

The spelling of 1722116705 in words is "one billion, seven hundred twenty-two million, one hundred sixteen thousand, seven hundred five".