9940143 has 16 divisors (see below), whose sum is σ = 13651200. Its totient is φ = 6431040.

The previous prime is 9940129. The next prime is 9940199. The reversal of 9940143 is 3410499.

It is not a de Polignac number, because 9940143 - 2⁵ = 9940111 is a prime.

9940143 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9940143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15438 + ... + 16068.

It is an arithmetic number, because the mean of its divisors is an integer number (853200).

Almost surely, 2^9940143 is an apocalyptic number.

9940143 is a deficient number, since it is larger than the sum of its proper divisors (3711057).

9940143 is a wasteful number, since it uses less digits than its factorization.

9940143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 9940143 is about 3152.7992324282. The cubic root of 9940143 is about 215.0127484779.

The spelling of 9940143 in words is "nine million, nine hundred forty thousand, one hundred forty-three".