1720133421239 has 4 divisors (see below), whose sum is σ = 1721038280280. Its totient is φ = 1719228562200.

The previous prime is 1720133421197. The next prime is 1720133421299. The reversal of 1720133421239 is 9321243310271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1720133421239 - 2²⁰ = 1720132372663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720133421299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452426669 + ... + 452430470.

It is an arithmetic number, because the mean of its divisors is an integer number (430259570070).

Almost surely, 2^{1720133421239} is an apocalyptic number.

1720133421239 is a deficient number, since it is larger than the sum of its proper divisors (904859041).

1720133421239 is an equidigital number, since it uses as much as digits as its factorization.

1720133421239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904859040.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 1720133421239 in words is "one trillion, seven hundred twenty billion, one hundred thirty-three million, four hundred twenty-one thousand, two hundred thirty-nine".