9999424 has 14 divisors (see below), whose sum is σ = 19842734. Its totient is φ = 4999680.

The previous prime is 9999419. The next prime is 9999433. The reversal of 9999424 is 4249999.

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 4981824 = 2240^2 + 2232^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78057 + ... + 78184.

Almost surely, 2^9999424 is an apocalyptic number.

It is an amenable number.

9999424 is a deficient number, since it is larger than the sum of its proper divisors (9843310).

9999424 is a wasteful number, since it uses less digits than its factorization.

9999424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156253 (or 156243 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The square root of 9999424 is about 3162.1865852603. The cubic root of 9999424 is about 215.4393324092.

The spelling of 9999424 in words is "nine million, nine hundred ninety-nine thousand, four hundred twenty-four".