47911687 has 2 divisors, whose sum is σ = 47911688. Its totient is φ = 47911686.

The previous prime is 47911663. The next prime is 47911733. The reversal of 47911687 is 78611974.

47911687 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 47911687 - 2¹⁹ = 47387399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47911187) 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, 23955843 + 23955844.

It is an arithmetic number, because the mean of its divisors is an integer number (23955844).

Almost surely, 2^47911687 is an apocalyptic number.

47911687 is a deficient number, since it is larger than the sum of its proper divisors (1).

47911687 is an equidigital number, since it uses as much as digits as its factorization.

47911687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The square root of 47911687 is about 6921.8268542344. The cubic root of 47911687 is about 363.2010992765.

The spelling of 47911687 in words is "forty-seven million, nine hundred eleven thousand, six hundred eighty-seven".