47791847 has 2 divisors, whose sum is σ = 47791848. Its totient is φ = 47791846.

The previous prime is 47791823. The next prime is 47791867. The reversal of 47791847 is 74819774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47791847 - 2¹⁰ = 47790823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47791867) 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, 23895923 + 23895924.

It is an arithmetic number, because the mean of its divisors is an integer number (23895924).

Almost surely, 2^47791847 is an apocalyptic number.

47791847 is a deficient number, since it is larger than the sum of its proper divisors (1).

47791847 is an equidigital number, since it uses as much as digits as its factorization.

47791847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 47.

The square root of 47791847 is about 6913.1647600791. The cubic root of 47791847 is about 362.8980252733.

The spelling of 47791847 in words is "forty-seven million, seven hundred ninety-one thousand, eight hundred forty-seven".