47447747 has 2 divisors, whose sum is σ = 47447748. Its totient is φ = 47447746.

The previous prime is 47447723. The next prime is 47447753. The reversal of 47447747 is 74774474.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47447747 - 2¹⁶ = 47382211 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47447698 and 47447707.

It is not a weakly prime, because it can be changed into another prime (47447717) 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, 23723873 + 23723874.

It is an arithmetic number, because the mean of its divisors is an integer number (23723874).

Almost surely, 2^47447747 is an apocalyptic number.

47447747 is a deficient number, since it is larger than the sum of its proper divisors (1).

47447747 is an equidigital number, since it uses as much as digits as its factorization.

47447747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 614656, while the sum is 44.

The square root of 47447747 is about 6888.2325018832. The cubic root of 47447747 is about 362.0249746208.

Adding to 47447747 its reverse (74774474), we get a palindrome (122222221).

The spelling of 47447747 in words is "forty-seven million, four hundred forty-seven thousand, seven hundred forty-seven".