723503 has 16 divisors (see below), whose sum is σ = 863136. Its totient is φ = 599040.

The previous prime is 723493. The next prime is 723529. The reversal of 723503 is 305327.

723503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 723503 - 2⁶ = 723439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9875 + ... + 9947.

It is an arithmetic number, because the mean of its divisors is an integer number (53946).

2⁷²³⁵⁰³ is an apocalyptic number.

723503 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

723503 is a deficient number, since it is larger than the sum of its proper divisors (139633).

723503 is a wasteful number, since it uses less digits than its factorization.

723503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154.

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

The square root of 723503 is about 850.5897953773. The cubic root of 723503 is about 89.7732150280.

The spelling of 723503 in words is "seven hundred twenty-three thousand, five hundred three".