47042447 has 2 divisors, whose sum is σ = 47042448. Its totient is φ = 47042446.

The previous prime is 47042377. The next prime is 47042497. The reversal of 47042447 is 74424074.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47042447 - 2¹² = 47038351 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 (47042497) 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, 23521223 + 23521224.

It is an arithmetic number, because the mean of its divisors is an integer number (23521224).

Almost surely, 2^47042447 is an apocalyptic number.

47042447 is a deficient number, since it is larger than the sum of its proper divisors (1).

47042447 is an equidigital number, since it uses as much as digits as its factorization.

47042447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 47042447 is about 6858.7496673957. The cubic root of 47042447 is about 360.9912163464.

The spelling of 47042447 in words is "forty-seven million, forty-two thousand, four hundred forty-seven".