47806939 has 2 divisors, whose sum is σ = 47806940. Its totient is φ = 47806938.

The previous prime is 47806937. The next prime is 47806999. The reversal of 47806939 is 93960874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47806939 - 2¹ = 47806937 is a prime.

Together with 47806937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (47806937) 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, 23903469 + 23903470.

It is an arithmetic number, because the mean of its divisors is an integer number (23903470).

Almost surely, 2^47806939 is an apocalyptic number.

47806939 is a deficient number, since it is larger than the sum of its proper divisors (1).

47806939 is an equidigital number, since it uses as much as digits as its factorization.

47806939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 47806939 is about 6914.2562145179. The cubic root of 47806939 is about 362.9362206346.

The spelling of 47806939 in words is "forty-seven million, eight hundred six thousand, nine hundred thirty-nine".