9911723 has 4 divisors (see below), whose sum is σ = 10231488. Its totient is φ = 9591960.

The previous prime is 9911717. The next prime is 9911743. The reversal of 9911723 is 3271199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3271199 = 109 ⋅30011.

It is a cyclic number.

It is not a de Polignac number, because 9911723 - 2⁶ = 9911659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9911723.

It is not an unprimeable number, because it can be changed into a prime (9911743) 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, 159836 + ... + 159897.

It is an arithmetic number, because the mean of its divisors is an integer number (2557872).

Almost surely, 2^9911723 is an apocalyptic number.

9911723 is a deficient number, since it is larger than the sum of its proper divisors (319765).

9911723 is a wasteful number, since it uses less digits than its factorization.

9911723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319764.

The product of its digits is 3402, while the sum is 32.

The square root of 9911723 is about 3148.2889003394. The cubic root of 9911723 is about 214.8076375698.

The spelling of 9911723 in words is "nine million, nine hundred eleven thousand, seven hundred twenty-three".