1729213 has 4 divisors (see below), whose sum is σ = 1733760. Its totient is φ = 1724668.

The previous prime is 1729207. The next prime is 1729229. The reversal of 1729213 is 3129271.

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 a de Polignac number, because none of the positive numbers 2^k-1729213 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 (1729253) 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, 1645 + ... + 2482.

It is an arithmetic number, because the mean of its divisors is an integer number (433440).

2^1729213 is an apocalyptic number.

It is an amenable number.

1729213 is a deficient number, since it is larger than the sum of its proper divisors (4547).

1729213 is an equidigital number, since it uses as much as digits as its factorization.

1729213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546.

The product of its digits is 756, while the sum is 25.

The square root of 1729213 is about 1314.9954372544. The cubic root of 1729213 is about 120.0280721362.

The spelling of 1729213 in words is "one million, seven hundred twenty-nine thousand, two hundred thirteen".