9720503 has 4 divisors (see below), whose sum is σ = 10468248. Its totient is φ = 8972760.

The previous prime is 9720497. The next prime is 9720521. The reversal of 9720503 is 3050279.

9720503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3050279 = 19 ⋅160541.

It is a cyclic number.

It is not a de Polignac number, because 9720503 - 2⁶ = 9720439 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 (9720523) 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, 373853 + ... + 373878.

It is an arithmetic number, because the mean of its divisors is an integer number (2617062).

Almost surely, 2^9720503 is an apocalyptic number.

9720503 is a deficient number, since it is larger than the sum of its proper divisors (747745).

9720503 is a wasteful number, since it uses less digits than its factorization.

9720503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747744.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 9720503 is about 3117.7721212430. The cubic root of 9720503 is about 213.4172795173.

The spelling of 9720503 in words is "nine million, seven hundred twenty thousand, five hundred three".