47838647 has 2 divisors, whose sum is σ = 47838648. Its totient is φ = 47838646.

The previous prime is 47838613. The next prime is 47838649. The reversal of 47838647 is 74683874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47838647 - 2¹² = 47834551 is a prime.

It is a super-2 number, since 2×47838647² = 4577072293581218, which contains 22 as substring.

Together with 47838649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47838649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23919323 + 23919324.

It is an arithmetic number, because the mean of its divisors is an integer number (23919324).

Almost surely, 2^47838647 is an apocalyptic number.

47838647 is a deficient number, since it is larger than the sum of its proper divisors (1).

47838647 is an equidigital number, since it uses as much as digits as its factorization.

47838647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 47.

The square root of 47838647 is about 6916.5487781118. The cubic root of 47838647 is about 363.0164421718.

The spelling of 47838647 in words is "forty-seven million, eight hundred thirty-eight thousand, six hundred forty-seven".