720343 has 4 divisors (see below), whose sum is σ = 775768. Its totient is φ = 664920.

The previous prime is 720319. The next prime is 720359. The reversal of 720343 is 343027.

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 720343 - 2⁵ = 720311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720373) 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, 27693 + ... + 27718.

It is an arithmetic number, because the mean of its divisors is an integer number (193942).

2⁷²⁰³⁴³ is an apocalyptic number.

720343 is a deficient number, since it is larger than the sum of its proper divisors (55425).

720343 is a wasteful number, since it uses less digits than its factorization.

720343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55424.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 720343 is about 848.7302280466. The cubic root of 720343 is about 89.6423252812.

The spelling of 720343 in words is "seven hundred twenty thousand, three hundred forty-three", and thus it is an iban number.