1720311984527 has 2 divisors, whose sum is σ = 1720311984528. Its totient is φ = 1720311984526.

The previous prime is 1720311984509. The next prime is 1720311984529. The reversal of 1720311984527 is 7254891130271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1720311984527 - 2²⁴ = 1720295207311 is a prime.

Together with 1720311984529, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720311984529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860155992263 + 860155992264.

It is an arithmetic number, because the mean of its divisors is an integer number (860155992264).

Almost surely, 2^{1720311984527} is an apocalyptic number.

1720311984527 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720311984527 is an equidigital number, since it uses as much as digits as its factorization.

1720311984527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 1720311984527 in words is "one trillion, seven hundred twenty billion, three hundred eleven million, nine hundred eighty-four thousand, five hundred twenty-seven".