47838839 has 2 divisors, whose sum is σ = 47838840. Its totient is φ = 47838838.

The previous prime is 47838829. The next prime is 47838853. The reversal of 47838839 is 93883874.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47838839 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47838829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23919419 + 23919420.

It is an arithmetic number, because the mean of its divisors is an integer number (23919420).

Almost surely, 2^47838839 is an apocalyptic number.

47838839 is a deficient number, since it is larger than the sum of its proper divisors (1).

47838839 is an equidigital number, since it uses as much as digits as its factorization.

47838839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 47838839 is about 6916.5626578525. The cubic root of 47838839 is about 363.0169278256.

The spelling of 47838839 in words is "forty-seven million, eight hundred thirty-eight thousand, eight hundred thirty-nine".