39838243 has 2 divisors, whose sum is σ = 39838244. Its totient is φ = 39838242.

The previous prime is 39838241. The next prime is 39838247. The reversal of 39838243 is 34283893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39838243 - 2¹ = 39838241 is a prime.

Together with 39838241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 39838196 and 39838205.

It is not a weakly prime, because it can be changed into another prime (39838241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19919121 + 19919122.

It is an arithmetic number, because the mean of its divisors is an integer number (19919122).

Almost surely, 2^39838243 is an apocalyptic number.

39838243 is a deficient number, since it is larger than the sum of its proper divisors (1).

39838243 is an equidigital number, since it uses as much as digits as its factorization.

39838243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 40.

The square root of 39838243 is about 6311.7543520007. The cubic root of 39838243 is about 341.5335655524.

The spelling of 39838243 in words is "thirty-nine million, eight hundred thirty-eight thousand, two hundred forty-three".