9949939 has 4 divisors (see below), whose sum is σ = 10473640. Its totient is φ = 9426240.

The previous prime is 9949931. The next prime is 9949943. The reversal of 9949939 is 9399499.

9949939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9949939 - 2³ = 9949931 is a prime.

It is a super-2 number, since 2×9949939² = 198002572207442, which contains 22 as substring.

It is a Duffinian number.

9949939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9949931) 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, 261822 + ... + 261859.

It is an arithmetic number, because the mean of its divisors is an integer number (2618410).

Almost surely, 2^9949939 is an apocalyptic number.

9949939 is a deficient number, since it is larger than the sum of its proper divisors (523701).

9949939 is a wasteful number, since it uses less digits than its factorization.

9949939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523700.

The product of its digits is 708588, while the sum is 52.

The square root of 9949939 is about 3154.3523899527. The cubic root of 9949939 is about 215.0833568972.

The spelling of 9949939 in words is "nine million, nine hundred forty-nine thousand, nine hundred thirty-nine".