1720351883797 has 2 divisors, whose sum is σ = 1720351883798. Its totient is φ = 1720351883796.

The previous prime is 1720351883773. The next prime is 1720351883821. The reversal of 1720351883797 is 7973881530271.

It is a balanced prime because it is at equal distance from previous prime (1720351883773) and next prime (1720351883821).

It can be written as a sum of positive squares in only one way, i.e., 1432842516196 + 287509367601 = 1197014^2 + 536199^2 .

It is a cyclic number.

It is not a de Polignac number, because 1720351883797 - 2¹⁹ = 1720351359509 is a prime.

It is a super-2 number, since 2×1720351883797² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720351833797) 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, 860175941898 + 860175941899.

It is an arithmetic number, because the mean of its divisors is an integer number (860175941899).

Almost surely, 2^{1720351883797} is an apocalyptic number.

It is an amenable number.

1720351883797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720351883797 is an equidigital number, since it uses as much as digits as its factorization.

1720351883797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 1720351883797 in words is "one trillion, seven hundred twenty billion, three hundred fifty-one million, eight hundred eighty-three thousand, seven hundred ninety-seven".