9940821143 has 8 divisors (see below), whose sum is σ = 10847051280. Its totient is φ = 9035010880.

The previous prime is 9940821133. The next prime is 9940821167. The reversal of 9940821143 is 3411280499.

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

It is a cyclic number.

It is not a de Polignac number, because 9940821143 - 2⁴ = 9940821127 is a prime.

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 9940821143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940821113) 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, 54398 + ... + 151131.

It is an arithmetic number, because the mean of its divisors is an integer number (1355881410).

Almost surely, 2^9940821143 is an apocalyptic number.

9940821143 is a deficient number, since it is larger than the sum of its proper divisors (906230137).

9940821143 is a wasteful number, since it uses less digits than its factorization.

9940821143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209937.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 9940821143 is about 99703.6666477216. Note that the first 4 decimals coincide. The cubic root of 9940821143 is about 2150.1763794726.

The spelling of 9940821143 in words is "nine billion, nine hundred forty million, eight hundred twenty-one thousand, one hundred forty-three".