9899726 has 8 divisors (see below), whose sum is σ = 15328704. Its totient is φ = 4790160.

The previous prime is 9899693. The next prime is 9899731. The reversal of 9899726 is 6279989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79775 + ... + 79898.

It is an arithmetic number, because the mean of its divisors is an integer number (1916088).

Almost surely, 2^9899726 is an apocalyptic number.

9899726 is a deficient number, since it is larger than the sum of its proper divisors (5428978).

9899726 is a wasteful number, since it uses less digits than its factorization.

9899726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159706.

The product of its digits is 489888, while the sum is 50.

The square root of 9899726 is about 3146.3830027509. The cubic root of 9899726 is about 214.7209359382.

The spelling of 9899726 in words is "nine million, eight hundred ninety-nine thousand, seven hundred twenty-six".