9979143 has 8 divisors (see below), whose sum is σ = 13423728. Its totient is φ = 6593664.

The previous prime is 9979127. The next prime is 9979163. The reversal of 9979143 is 3419799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9979143 - 2⁴ = 9979127 is a prime.

9979143 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9979095 and 9979104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14380 + ... + 15057.

It is an arithmetic number, because the mean of its divisors is an integer number (1677966).

Almost surely, 2^9979143 is an apocalyptic number.

9979143 is a deficient number, since it is larger than the sum of its proper divisors (3444585).

9979143 is a wasteful number, since it uses less digits than its factorization.

9979143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29553.

The product of its digits is 61236, while the sum is 42.

The square root of 9979143 is about 3158.9781575693. The cubic root of 9979143 is about 215.2935812668.

The spelling of 9979143 in words is "nine million, nine hundred seventy-nine thousand, one hundred forty-three".