9979873 has 4 divisors (see below), whose sum is σ = 10014228. Its totient is φ = 9945520.

The previous prime is 9979859. The next prime is 9979877. The reversal of 9979873 is 3789799.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3869089 + 6110784 = 1967^2 + 2472^2 .

It is a cyclic number.

It is not a de Polignac number, because 9979873 - 2¹³ = 9971681 is a prime.

It is a super-2 number, since 2×9979873² = 199195730192258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9979873.

It is not an unprimeable number, because it can be changed into a prime (9979877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16738 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (2503557).

Almost surely, 2^9979873 is an apocalyptic number.

It is an amenable number.

9979873 is a deficient number, since it is larger than the sum of its proper divisors (34355).

9979873 is a wasteful number, since it uses less digits than its factorization.

9979873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34354.

The product of its digits is 857304, while the sum is 52.

The square root of 9979873 is about 3159.0936991485. The cubic root of 9979873 is about 215.2988308987.

The spelling of 9979873 in words is "nine million, nine hundred seventy-nine thousand, eight hundred seventy-three".