1720500229 has 4 divisors (see below), whose sum is σ = 1966285984. Its totient is φ = 1474714476.

The previous prime is 1720500227. The next prime is 1720500233. The reversal of 1720500229 is 9220050271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1720500229 - 2¹ = 1720500227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1720500197 and 1720500206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720500227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122892867 + ... + 122892880.

It is an arithmetic number, because the mean of its divisors is an integer number (491571496).

Almost surely, 2^1720500229 is an apocalyptic number.

It is an amenable number.

1720500229 is a deficient number, since it is larger than the sum of its proper divisors (245785755).

1720500229 is an equidigital number, since it uses as much as digits as its factorization.

1720500229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245785754.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1720500229 is about 41478.9130643511. The cubic root of 1720500229 is about 1198.2614242432.

The spelling of 1720500229 in words is "one billion, seven hundred twenty million, five hundred thousand, two hundred twenty-nine".