9920279 has 4 divisors (see below), whose sum is σ = 10240320. Its totient is φ = 9600240.

The previous prime is 9920257. The next prime is 9920293. The reversal of 9920279 is 9720299.

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 9920279 - 2¹² = 9916183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920219) 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, 159974 + ... + 160035.

It is an arithmetic number, because the mean of its divisors is an integer number (2560080).

Almost surely, 2^9920279 is an apocalyptic number.

9920279 is a deficient number, since it is larger than the sum of its proper divisors (320041).

9920279 is a wasteful number, since it uses less digits than its factorization.

9920279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320040.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 9920279 is about 3149.6474405876. The cubic root of 9920279 is about 214.8694285609.

The spelling of 9920279 in words is "nine million, nine hundred twenty thousand, two hundred seventy-nine".