8143939 has 2 divisors, whose sum is σ = 8143940. Its totient is φ = 8143938.

The previous prime is 8143937. The next prime is 8143987. The reversal of 8143939 is 9393418.

8143939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8143939 - 2¹ = 8143937 is a prime.

Together with 8143937, it forms a pair of twin primes.

8143939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8143898 and 8143907.

It is not a weakly prime, because it can be changed into another prime (8143931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4071969 + 4071970.

It is an arithmetic number, because the mean of its divisors is an integer number (4071970).

Almost surely, 2^8143939 is an apocalyptic number.

8143939 is a deficient number, since it is larger than the sum of its proper divisors (1).

8143939 is an equidigital number, since it uses as much as digits as its factorization.

8143939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 8143939 is about 2853.7587494391. The cubic root of 8143939 is about 201.1923688226.

It can be divided in two parts, 814 and 3939, that added together give a triangular number (4753 = T₉₇).

The spelling of 8143939 in words is "eight million, one hundred forty-three thousand, nine hundred thirty-nine".