9979543 has 4 divisors (see below), whose sum is σ = 11405200. Its totient is φ = 8553888.

The previous prime is 9979537. The next prime is 9979549. The reversal of 9979543 is 3459799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3459799 = 7 ⋅494257.

It is an interprime number because it is at equal distance from previous prime (9979537) and next prime (9979549).

It is not a de Polignac number, because 9979543 - 2⁵ = 9979511 is a prime.

It is a super-3 number, since 3×9979543³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9979493 and 9979502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979549) 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, 712818 + ... + 712831.

It is an arithmetic number, because the mean of its divisors is an integer number (2851300).

Almost surely, 2^9979543 is an apocalyptic number.

9979543 is a deficient number, since it is larger than the sum of its proper divisors (1425657).

9979543 is a wasteful number, since it uses less digits than its factorization.

9979543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425656.

The product of its digits is 306180, while the sum is 46.

The square root of 9979543 is about 3159.0414685471. The cubic root of 9979543 is about 215.2964578091.

The spelling of 9979543 in words is "nine million, nine hundred seventy-nine thousand, five hundred forty-three".