9976143 has 4 divisors (see below), whose sum is σ = 13301528. Its totient is φ = 6650760.

The previous prime is 9976103. The next prime is 9976151. The reversal of 9976143 is 3416799.

9976143 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9976143 - 2⁹ = 9975631 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 (9976103) 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, 1662688 + ... + 1662693.

It is an arithmetic number, because the mean of its divisors is an integer number (3325382).

Almost surely, 2^9976143 is an apocalyptic number.

9976143 is a deficient number, since it is larger than the sum of its proper divisors (3325385).

9976143 is a wasteful number, since it uses less digits than its factorization.

9976143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325384.

The product of its digits is 40824, while the sum is 39.

The square root of 9976143 is about 3158.5032847854. The cubic root of 9976143 is about 215.2720047487.

It can be divided in two parts, 997 and 6143, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 9976143 in words is "nine million, nine hundred seventy-six thousand, one hundred forty-three".