9979913 has 4 divisors (see below), whose sum is σ = 10212048. Its totient is φ = 9747780.

The previous prime is 9979897. The next prime is 9979927. The reversal of 9979913 is 3199799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3199799 = 313 ⋅10223.

It is a cyclic number.

It is not a de Polignac number, because 9979913 - 2⁴ = 9979897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9979943) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 116003 + ... + 116088.

It is an arithmetic number, because the mean of its divisors is an integer number (2553012).

Almost surely, 2^9979913 is an apocalyptic number.

It is an amenable number.

9979913 is a deficient number, since it is larger than the sum of its proper divisors (232135).

9979913 is a wasteful number, since it uses less digits than its factorization.

9979913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232134.

The product of its digits is 137781, while the sum is 47.

The square root of 9979913 is about 3159.1000300719. The cubic root of 9979913 is about 215.2991185423.

The spelling of 9979913 in words is "nine million, nine hundred seventy-nine thousand, nine hundred thirteen".