9999723 has 8 divisors (see below), whose sum is σ = 14117328. Its totient is φ = 6274304.

The previous prime is 9999713. The next prime is 9999739. The reversal of 9999723 is 3279999.

It is a happy number.

9999723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9999723 - 2⁶ = 9999659 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9999713) 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, 97986 + ... + 98087.

It is an arithmetic number, because the mean of its divisors is an integer number (1764666).

Almost surely, 2^9999723 is an apocalyptic number.

9999723 is a deficient number, since it is larger than the sum of its proper divisors (4117605).

9999723 is a wasteful number, since it uses less digits than its factorization.

9999723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196093.

The product of its digits is 275562, while the sum is 48.

The square root of 9999723 is about 3162.2338623195. The cubic root of 9999723 is about 215.4414797235.

The spelling of 9999723 in words is "nine million, nine hundred ninety-nine thousand, seven hundred twenty-three".