1720800701 has 2 divisors, whose sum is σ = 1720800702. Its totient is φ = 1720800700.

The previous prime is 1720800677. The next prime is 1720800779. The reversal of 1720800701 is 1070080271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1716113476 + 4687225 = 41426^2 + 2165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1720800701 is a prime.

It is a super-2 number, since 2×1720800701² = 5922310105124182802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720802701) 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, 860400350 + 860400351.

It is an arithmetic number, because the mean of its divisors is an integer number (860400351).

Almost surely, 2^1720800701 is an apocalyptic number.

It is an amenable number.

1720800701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720800701 is an equidigital number, since it uses as much as digits as its factorization.

1720800701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1720800701 is about 41482.5348912045. The cubic root of 1720800701 is about 1198.3311758660.

Adding to 1720800701 its reverse (1070080271), we get a palindrome (2790880972).

The spelling of 1720800701 in words is "one billion, seven hundred twenty million, eight hundred thousand, seven hundred one".