47808391 has 2 divisors, whose sum is σ = 47808392. Its totient is φ = 47808390.

The previous prime is 47808367. The next prime is 47808401. The reversal of 47808391 is 19380874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47808391 - 2⁵ = 47808359 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47808331) 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, 23904195 + 23904196.

It is an arithmetic number, because the mean of its divisors is an integer number (23904196).

Almost surely, 2^47808391 is an apocalyptic number.

47808391 is a deficient number, since it is larger than the sum of its proper divisors (1).

47808391 is an equidigital number, since it uses as much as digits as its factorization.

47808391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 47808391 is about 6914.3612141687. The cubic root of 47808391 is about 362.9398949831.

The spelling of 47808391 in words is "forty-seven million, eight hundred eight thousand, three hundred ninety-one".