9949999 has 4 divisors (see below), whose sum is σ = 9964000. Its totient is φ = 9936000.

The previous prime is 9949967. The next prime is 9950021. The reversal of 9949999 is 9999499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9999499 = 347 ⋅28817.

It is a cyclic number.

It is not a de Polignac number, because 9949999 - 2⁵ = 9949967 is a prime.

It is a Duffinian number.

9949999 is a modest number, since divided by 9999 gives 994 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9949909) 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, 5874 + ... + 7375.

It is an arithmetic number, because the mean of its divisors is an integer number (2491000).

Almost surely, 2^9949999 is an apocalyptic number.

9949999 is a deficient number, since it is larger than the sum of its proper divisors (14001).

9949999 is a wasteful number, since it uses less digits than its factorization.

9949999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14000.

The product of its digits is 2125764, while the sum is 58.

The square root of 9949999 is about 3154.3619006068. The cubic root of 9949999 is about 215.0837892273.

The spelling of 9949999 in words is "nine million, nine hundred forty-nine thousand, nine hundred ninety-nine".