8423939943 has 24 divisors (see below), whose sum is σ = 12955690800. Its totient is φ = 5256063744.

The previous prime is 8423939941. The next prime is 8423939963. The reversal of 8423939943 is 3499393248.

8423939943 is a `hidden beast` number, since 8 + 423 + 93 + 99 + 43 = 666.

It is not a de Polignac number, because 8423939943 - 2¹ = 8423939941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8423939943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8423939941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126408 + ... + 181181.

It is an arithmetic number, because the mean of its divisors is an integer number (539820450).

Almost surely, 2^8423939943 is an apocalyptic number.

8423939943 is a deficient number, since it is larger than the sum of its proper divisors (4531750857).

8423939943 is a wasteful number, since it uses less digits than its factorization.

8423939943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307791 (or 307788 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The square root of 8423939943 is about 91782.0240733446. The cubic root of 8423939943 is about 2034.7220304222.

The spelling of 8423939943 in words is "eight billion, four hundred twenty-three million, nine hundred thirty-nine thousand, nine hundred forty-three".