47878247 has 2 divisors, whose sum is σ = 47878248. Its totient is φ = 47878246.

The previous prime is 47878231. The next prime is 47878253. The reversal of 47878247 is 74287874.

47878247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47878247 - 2⁴ = 47878231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47878277) 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, 23939123 + 23939124.

It is an arithmetic number, because the mean of its divisors is an integer number (23939124).

Almost surely, 2^47878247 is an apocalyptic number.

47878247 is a deficient number, since it is larger than the sum of its proper divisors (1).

47878247 is an equidigital number, since it uses as much as digits as its factorization.

47878247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 702464, while the sum is 47.

The square root of 47878247 is about 6919.4108853283. The cubic root of 47878247 is about 363.1165807783.

The spelling of 47878247 in words is "forty-seven million, eight hundred seventy-eight thousand, two hundred forty-seven".