9998726 has 4 divisors (see below), whose sum is σ = 14998092. Its totient is φ = 4999362.

The previous prime is 9998719. The next prime is 9998741. The reversal of 9998726 is 6278999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6278999 = 79 ⋅79481.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499680 + ... + 2499683.

It is an arithmetic number, because the mean of its divisors is an integer number (3749523).

Almost surely, 2^9998726 is an apocalyptic number.

9998726 is a deficient number, since it is larger than the sum of its proper divisors (4999366).

9998726 is a wasteful number, since it uses less digits than its factorization.

9998726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999365.

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

The square root of 9998726 is about 3162.0762166652. The cubic root of 9998726 is about 215.4343194486.

The spelling of 9998726 in words is "nine million, nine hundred ninety-eight thousand, seven hundred twenty-six".