47919187 has 4 divisors (see below), whose sum is σ = 47944296. Its totient is φ = 47894080.

The previous prime is 47919173. The next prime is 47919199. The reversal of 47919187 is 78191974.

47919187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47919187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47919127) 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 in 3 ways as a sum of consecutive naturals, for example, 9433 + ... + 13594.

It is an arithmetic number, because the mean of its divisors is an integer number (11986074).

Almost surely, 2^47919187 is an apocalyptic number.

47919187 is a deficient number, since it is larger than the sum of its proper divisors (25109).

47919187 is a wasteful number, since it uses less digits than its factorization.

47919187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25108.

The product of its digits is 127008, while the sum is 46.

The square root of 47919187 is about 6922.3685975250. The cubic root of 47919187 is about 363.2200498798.

The spelling of 47919187 in words is "forty-seven million, nine hundred nineteen thousand, one hundred eighty-seven".