47851939 has 2 divisors, whose sum is σ = 47851940. Its totient is φ = 47851938.

The previous prime is 47851933. The next prime is 47851963. The reversal of 47851939 is 93915874.

It is a happy number.

47851939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47851939 - 2³ = 47851931 is a prime.

It is not a weakly prime, because it can be changed into another prime (47851931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23925969 + 23925970.

It is an arithmetic number, because the mean of its divisors is an integer number (23925970).

Almost surely, 2^47851939 is an apocalyptic number.

47851939 is a deficient number, since it is larger than the sum of its proper divisors (1).

47851939 is an equidigital number, since it uses as much as digits as its factorization.

47851939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 47851939 is about 6917.5095952228. The cubic root of 47851939 is about 363.0500605119.

It can be divided in two parts, 4785 and 1939, that added together give a square (6724 = 82²).

The spelling of 47851939 in words is "forty-seven million, eight hundred fifty-one thousand, nine hundred thirty-nine".