720533 has 8 divisors (see below), whose sum is σ = 811776. Its totient is φ = 633600.

The previous prime is 720527. The next prime is 720547. The reversal of 720533 is 335027.

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

It is a de Polignac number, because none of the positive numbers 2^k-720533 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720533.

It is not an unprimeable number, because it can be changed into a prime (720133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716 + ... + 1397.

It is an arithmetic number, because the mean of its divisors is an integer number (101472).

2⁷²⁰⁵³³ is an apocalyptic number.

It is an amenable number.

720533 is a deficient number, since it is larger than the sum of its proper divisors (91243).

720533 is a wasteful number, since it uses less digits than its factorization.

720533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 720533 is about 848.8421525820. The cubic root of 720533 is about 89.6502060382.

The spelling of 720533 in words is "seven hundred twenty thousand, five hundred thirty-three".