1720652008429 has 2 divisors, whose sum is σ = 1720652008430. Its totient is φ = 1720652008428.

The previous prime is 1720652008409. The next prime is 1720652008463. The reversal of 1720652008429 is 9248002560271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 944156192329 + 776495816100 = 971677^2 + 881190^2 .

It is an emirp because it is prime and its reverse (9248002560271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1720652008429 - 2⁷ = 1720652008301 is a prime.

It is a super-2 number, since 2×1720652008429² (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 (1720652008409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860326004214 + 860326004215.

It is an arithmetic number, because the mean of its divisors is an integer number (860326004215).

Almost surely, 2^{1720652008429} is an apocalyptic number.

It is an amenable number.

1720652008429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720652008429 is an equidigital number, since it uses as much as digits as its factorization.

1720652008429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 1720652008429 in words is "one trillion, seven hundred twenty billion, six hundred fifty-two million, eight thousand, four hundred twenty-nine".