720499 has 8 divisors (see below), whose sum is σ = 817040. Its totient is φ = 629856.

The previous prime is 720497. The next prime is 720527. The reversal of 720499 is 994027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 9-Lehmer number, since φ(720499) divides (720499-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 720499 - 2¹ = 720497 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 720499.

It is not an unprimeable number, because it can be changed into a prime (720491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (102130).

2⁷²⁰⁴⁹⁹ is an apocalyptic number.

720499 is a deficient number, since it is larger than the sum of its proper divisors (96541).

720499 is a wasteful number, since it uses less digits than its factorization.

720499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 720499 is about 848.8221250651. The cubic root of 720499 is about 89.6487958993.

The spelling of 720499 in words is "seven hundred twenty thousand, four hundred ninety-nine".