9780723 has 16 divisors (see below), whose sum is σ = 14592000. Its totient is φ = 6474600.

The previous prime is 9780721. The next prime is 9780731. The reversal of 9780723 is 3270879.

It is not a de Polignac number, because 9780723 - 2¹ = 9780721 is a prime.

9780723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9780721) 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, 2878 + ... + 5276.

It is an arithmetic number, because the mean of its divisors is an integer number (912000).

Almost surely, 2^9780723 is an apocalyptic number.

9780723 is a deficient number, since it is larger than the sum of its proper divisors (4811277).

9780723 is a wasteful number, since it uses less digits than its factorization.

9780723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559 (or 2553 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 9780723 is about 3127.4147470395. The cubic root of 9780723 is about 213.8570900748.

The spelling of 9780723 in words is "nine million, seven hundred eighty thousand, seven hundred twenty-three".