9915723 has 16 divisors (see below), whose sum is σ = 14778400. Its totient is φ = 6570720.

The previous prime is 9915721. The next prime is 9915749. The reversal of 9915723 is 3275199.

It is not a de Polignac number, because 9915723 - 2¹ = 9915721 is a prime.

It is a super-2 number, since 2×9915723² = 196643125225458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9915721) 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 15 ways as a sum of consecutive naturals, for example, 3873 + ... + 5901.

It is an arithmetic number, because the mean of its divisors is an integer number (923650).

Almost surely, 2^9915723 is an apocalyptic number.

9915723 is a deficient number, since it is larger than the sum of its proper divisors (4862677).

9915723 is a wasteful number, since it uses less digits than its factorization.

9915723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219 (or 2213 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 9915723 is about 3148.9241019751. The cubic root of 9915723 is about 214.8365297880.

The spelling of 9915723 in words is "nine million, nine hundred fifteen thousand, seven hundred twenty-three".