47420647 has 2 divisors, whose sum is σ = 47420648. Its totient is φ = 47420646.

The previous prime is 47420629. The next prime is 47420671. The reversal of 47420647 is 74602474.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47420647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47420617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23710323 + 23710324.

It is an arithmetic number, because the mean of its divisors is an integer number (23710324).

Almost surely, 2^47420647 is an apocalyptic number.

47420647 is a deficient number, since it is larger than the sum of its proper divisors (1).

47420647 is an equidigital number, since it uses as much as digits as its factorization.

47420647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 47420647 is about 6886.2650980049. The cubic root of 47420647 is about 361.9560374153.

The spelling of 47420647 in words is "forty-seven million, four hundred twenty thousand, six hundred forty-seven".