720443 has 4 divisors (see below), whose sum is σ = 762840. Its totient is φ = 678048.

The previous prime is 720439. The next prime is 720481. The reversal of 720443 is 344027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344027 = 29 ⋅11863.

It is a cyclic number.

It is not a de Polignac number, because 720443 - 2² = 720439 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720443.

It is not an unprimeable number, because it can be changed into a prime (720403) 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, 21173 + ... + 21206.

It is an arithmetic number, because the mean of its divisors is an integer number (190710).

2⁷²⁰⁴⁴³ is an apocalyptic number.

720443 is a deficient number, since it is larger than the sum of its proper divisors (42397).

720443 is a wasteful number, since it uses less digits than its factorization.

720443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42396.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 720443 is about 848.7891375365. The cubic root of 720443 is about 89.6464732208.

The spelling of 720443 in words is "seven hundred twenty thousand, four hundred forty-three", and thus it is an iban number.