723603 has 8 divisors (see below), whose sum is σ = 1006848. Its totient is φ = 461384.

The previous prime is 723601. The next prime is 723607. The reversal of 723603 is 306327.

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

It is a cyclic number.

It is not a de Polignac number, because 723603 - 2¹ = 723601 is a prime.

723603 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 723603.

It is not an unprimeable number, because it can be changed into a prime (723601) 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, 5175 + ... + 5312.

It is an arithmetic number, because the mean of its divisors is an integer number (125856).

2⁷²³⁶⁰³ is an apocalyptic number.

723603 is a deficient number, since it is larger than the sum of its proper divisors (283245).

723603 is a wasteful number, since it uses less digits than its factorization.

723603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10513.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 723603 is about 850.6485760877. The cubic root of 723603 is about 89.7773508818. Note that the first 3 decimals are identical.

It can be divided in two parts, 723 and 603, that added together give a triangular number (1326 = T₅₁).

The spelling of 723603 in words is "seven hundred twenty-three thousand, six hundred three".