9926979 has 4 divisors (see below), whose sum is σ = 13235976. Its totient is φ = 6617984.

The previous prime is 9926951. The next prime is 9926999. The reversal of 9926979 is 9796299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9796299 = 3 ⋅3265433.

It is a cyclic number.

It is not a de Polignac number, because 9926979 - 2⁵ = 9926947 is a prime.

9926979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9926909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654494 + ... + 1654499.

It is an arithmetic number, because the mean of its divisors is an integer number (3308994).

Almost surely, 2^9926979 is an apocalyptic number.

9926979 is a deficient number, since it is larger than the sum of its proper divisors (3308997).

9926979 is a wasteful number, since it uses less digits than its factorization.

9926979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308996.

The product of its digits is 551124, while the sum is 51.

The square root of 9926979 is about 3150.7108721684. The cubic root of 9926979 is about 214.9177908161.

The spelling of 9926979 in words is "nine million, nine hundred twenty-six thousand, nine hundred seventy-nine".