1720834056523 has 2 divisors, whose sum is σ = 1720834056524. Its totient is φ = 1720834056522.

The previous prime is 1720834056493. The next prime is 1720834056553. The reversal of 1720834056523 is 3256504380271.

It is a balanced prime because it is at equal distance from previous prime (1720834056493) and next prime (1720834056553).

It is a cyclic number.

It is not a de Polignac number, because 1720834056523 - 2³⁷ = 1583395103051 is a prime.

It is a super-2 number, since 2×1720834056523² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1720834056553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860417028261 + 860417028262.

It is an arithmetic number, because the mean of its divisors is an integer number (860417028262).

Almost surely, 2^{1720834056523} is an apocalyptic number.

1720834056523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720834056523 is an equidigital number, since it uses as much as digits as its factorization.

1720834056523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 1720834056523 in words is "one trillion, seven hundred twenty billion, eight hundred thirty-four million, fifty-six thousand, five hundred twenty-three".