47639863 has 2 divisors, whose sum is σ = 47639864. Its totient is φ = 47639862.

The previous prime is 47639861. The next prime is 47639929. The reversal of 47639863 is 36893674.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47639863 - 2¹ = 47639861 is a prime.

Together with 47639861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47639861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23819931 + 23819932.

It is an arithmetic number, because the mean of its divisors is an integer number (23819932).

Almost surely, 2^47639863 is an apocalyptic number.

47639863 is a deficient number, since it is larger than the sum of its proper divisors (1).

47639863 is an equidigital number, since it uses as much as digits as its factorization.

47639863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The square root of 47639863 is about 6902.1636462779. The cubic root of 47639863 is about 362.5129298599.

The spelling of 47639863 in words is "forty-seven million, six hundred thirty-nine thousand, eight hundred sixty-three".