1729223 has 4 divisors (see below), whose sum is σ = 1830960. Its totient is φ = 1627488.

The previous prime is 1729207. The next prime is 1729229. The reversal of 1729223 is 3229271.

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 1729223 - 2⁴ = 1729207 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1729192 and 1729201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729229) 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, 50843 + ... + 50876.

It is an arithmetic number, because the mean of its divisors is an integer number (457740).

2^1729223 is an apocalyptic number.

1729223 is a deficient number, since it is larger than the sum of its proper divisors (101737).

1729223 is a wasteful number, since it uses less digits than its factorization.

1729223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101736.

The product of its digits is 1512, while the sum is 26.

The square root of 1729223 is about 1314.9992395435. Note that the first 3 decimals coincide. The cubic root of 1729223 is about 120.0283035089.

The spelling of 1729223 in words is "one million, seven hundred twenty-nine thousand, two hundred twenty-three".